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121431 = 3172381
BaseRepresentation
bin11101101001010111
320011120110
4131221113
512341211
62334103
71014012
oct355127
9204513
10121431
1183262
125a333
134336b
1432379
1525ea6
hex1da57

121431 has 8 divisors (see below), whose sum is σ = 171504. Its totient is φ = 76160.

The previous prime is 121421. The next prime is 121439. The reversal of 121431 is 134121.

It is a happy number.

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

It is not a de Polignac number, because 121431 - 26 = 121367 is a prime.

It is a super-2 number, since 2×1214312 = 29490975522, which contains 22 as substring.

121431 is a lucky number.

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 121431.

It is not an unprimeable number, because it can be changed into a prime (121439) 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, 1140 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (21438).

2121431 is an apocalyptic number.

121431 is a deficient number, since it is larger than the sum of its proper divisors (50073).

121431 is a wasteful number, since it uses less digits than its factorization.

121431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

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

The square root of 121431 is about 348.4695108614. The cubic root of 121431 is about 49.5195311152.

Adding to 121431 its reverse (134121), we get a palindrome (255552).

The spelling of 121431 in words is "one hundred twenty-one thousand, four hundred thirty-one".

Divisors: 1 3 17 51 2381 7143 40477 121431