392642561 has 8 divisors (see below), whose sum is σ = 398993280. Its totient is φ = 386326512.

The previous prime is 392642533. The next prime is 392642573. The reversal of 392642561 is 165246293.

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

It is a cyclic number.

It is not a de Polignac number, because 392642561 - 2¹⁴ = 392626177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392642161) 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, 14666 + ... + 31628.

It is an arithmetic number, because the mean of its divisors is an integer number (49874160).

Almost surely, 2^392642561 is an apocalyptic number.

It is an amenable number.

392642561 is a deficient number, since it is larger than the sum of its proper divisors (6350719).

392642561 is a wasteful number, since it uses less digits than its factorization.

392642561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17335.

The product of its digits is 77760, while the sum is 38.

The square root of 392642561 is about 19815.2103445813. The cubic root of 392642561 is about 732.2608092751.

The spelling of 392642561 in words is "three hundred ninety-two million, six hundred forty-two thousand, five hundred sixty-one".