642492365 has 8 divisors (see below), whose sum is σ = 777062400. Its totient is φ = 509946192.

The previous prime is 642492343. The next prime is 642492371. The reversal of 642492365 is 563294246.

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 642492365 - 2²² = 638298061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505265 + ... + 506534.

It is an arithmetic number, because the mean of its divisors is an integer number (97132800).

Almost surely, 2^642492365 is an apocalyptic number.

It is an amenable number.

642492365 is a deficient number, since it is larger than the sum of its proper divisors (134570035).

642492365 is a wasteful number, since it uses less digits than its factorization.

642492365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011931.

The product of its digits is 311040, while the sum is 41.

The square root of 642492365 is about 25347.4331047544. The cubic root of 642492365 is about 862.8911014908.

It can be divided in two parts, 6424 and 92365, that added together give a palindrome (98789).

The spelling of 642492365 in words is "six hundred forty-two million, four hundred ninety-two thousand, three hundred sixty-five".