252912643 has 4 divisors (see below), whose sum is σ = 253119328. Its totient is φ = 252705960.

The previous prime is 252912617. The next prime is 252912697. The reversal of 252912643 is 346219252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252912643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252912599 and 252912608.

It is not an unprimeable number, because it can be changed into a prime (252910643) 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 3 ways as a sum of consecutive naturals, for example, 101496 + ... + 103957.

It is an arithmetic number, because the mean of its divisors is an integer number (63279832).

Almost surely, 2^252912643 is an apocalyptic number.

252912643 is a deficient number, since it is larger than the sum of its proper divisors (206685).

252912643 is a wasteful number, since it uses less digits than its factorization.

252912643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206684.

The product of its digits is 25920, while the sum is 34.

The square root of 252912643 is about 15903.2274397369. The cubic root of 252912643 is about 632.3975518740.

The spelling of 252912643 in words is "two hundred fifty-two million, nine hundred twelve thousand, six hundred forty-three".