642274415 has 4 divisors (see below), whose sum is σ = 770729304. Its totient is φ = 513819528.

The previous prime is 642274387. The next prime is 642274417. The reversal of 642274415 is 514472246.

It is a happy number.

642274415 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642274415 - 2⁶ = 642274351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642274417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64227437 + ... + 64227446.

It is an arithmetic number, because the mean of its divisors is an integer number (192682326).

Almost surely, 2^642274415 is an apocalyptic number.

642274415 is a deficient number, since it is larger than the sum of its proper divisors (128454889).

642274415 is a wasteful number, since it uses less digits than its factorization.

642274415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128454888.

The product of its digits is 53760, while the sum is 35.

The square root of 642274415 is about 25343.1334881857. The cubic root of 642274415 is about 862.7935188083.

The spelling of 642274415 in words is "six hundred forty-two million, two hundred seventy-four thousand, four hundred fifteen".