642315465 has 24 divisors (see below), whose sum is σ = 1214561088. Its totient is φ = 311425440.

The previous prime is 642315433. The next prime is 642315517. The reversal of 642315465 is 564513246.

642315465 is a `hidden beast` number, since 642 + 3 + 1 + 5 + 4 + 6 + 5 = 666.

It is not a de Polignac number, because 642315465 - 2⁵ = 642315433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648309 + ... + 649298.

It is an arithmetic number, because the mean of its divisors is an integer number (50606712).

Almost surely, 2^642315465 is an apocalyptic number.

It is an amenable number.

642315465 is a deficient number, since it is larger than the sum of its proper divisors (572245623).

642315465 is a wasteful number, since it uses less digits than its factorization.

642315465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297629 (or 1297626 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 642315465 is about 25343.9433593117. The cubic root of 642315465 is about 862.8118997987.

It can be divided in two parts, 64231 and 5465, that added together give a palindrome (69696).

The spelling of 642315465 in words is "six hundred forty-two million, three hundred fifteen thousand, four hundred sixty-five".