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120621 = 3311297
BaseRepresentation
bin11101011100101101
320010110110
4131130231
512324441
62330233
71011444
oct353455
9203413
10120621
1182696
1259979
1342b97
1431d5b
1525b16
hex1d72d

120621 has 8 divisors (see below), whose sum is σ = 166144. Its totient is φ = 77760.

The previous prime is 120619. The next prime is 120623. The reversal of 120621 is 126021.

Adding to 120621 its reverse (126021), we get a palindrome (246642).

It can be divided in two parts, 120 and 621, that added together give a triangular number (741 = T38).

It is an interprime number because it is at equal distance from previous prime (120619) and next prime (120623).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120621 - 21 = 120619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120597 and 120606.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 120621.

It is not an unprimeable number, because it can be changed into a prime (120623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556 + ... + 741.

It is an arithmetic number, because the mean of its divisors is an integer number (20768).

2120621 is an apocalyptic number.

120621 is the 186-th nonagonal number.

It is an amenable number.

120621 is a deficient number, since it is larger than the sum of its proper divisors (45523).

120621 is a wasteful number, since it uses less digits than its factorization.

120621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 120621 is about 347.3053411625. The cubic root of 120621 is about 49.4091794532.

The spelling of 120621 in words is "one hundred twenty thousand, six hundred twenty-one".

Divisors: 1 3 31 93 1297 3891 40207 120621