642515274 has 16 divisors (see below), whose sum is σ = 1427811840. Its totient is φ = 214171740.

The previous prime is 642515273. The next prime is 642515287. The reversal of 642515274 is 472515246.

It is a happy number.

642515274 is a `hidden beast` number, since 642 + 5 + 1 + 5 + 2 + 7 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (642515273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5949162 + ... + 5949269.

It is an arithmetic number, because the mean of its divisors is an integer number (89238240).

Almost surely, 2^642515274 is an apocalyptic number.

642515274 is an abundant number, since it is smaller than the sum of its proper divisors (785296566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642515274 is a wasteful number, since it uses less digits than its factorization.

642515274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11898442 (or 11898436 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 642515274 is about 25347.8850005282. The cubic root of 642515274 is about 862.9013572481.

The spelling of 642515274 in words is "six hundred forty-two million, five hundred fifteen thousand, two hundred seventy-four".