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147921 = 349307
BaseRepresentation
bin100100000111010001
321111220120
4210013101
514213141
63100453
71154154
oct440721
9244816
10147921
11a1154
1271729
1352437
143bc9b
152dc66
hex241d1

147921 has 4 divisors (see below), whose sum is σ = 197232. Its totient is φ = 98612.

The previous prime is 147919. The next prime is 147937. The reversal of 147921 is 129741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 147921 - 21 = 147919 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 147891 and 147900.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147921.

It is not an unprimeable number, because it can be changed into a prime (147221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24651 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (49308).

2147921 is an apocalyptic number.

It is an amenable number.

147921 is a deficient number, since it is larger than the sum of its proper divisors (49311).

147921 is an equidigital number, since it uses as much as digits as its factorization.

147921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49310.

The product of its digits is 504, while the sum is 24.

The square root of 147921 is about 384.6049921673. The cubic root of 147921 is about 52.8863114252.

The spelling of 147921 in words is "one hundred forty-seven thousand, nine hundred twenty-one".

Divisors: 1 3 49307 147921