642531514 has 8 divisors (see below), whose sum is σ = 965046420. Its totient is φ = 320849376.

The previous prime is 642531497. The next prime is 642531521. The reversal of 642531514 is 415135246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 542191225 + 100340289 = 23285^2 + 10017^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206259 + ... + 209350.

Almost surely, 2^642531514 is an apocalyptic number.

642531514 is a deficient number, since it is larger than the sum of its proper divisors (322514906).

642531514 is a wasteful number, since it uses less digits than its factorization.

642531514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416384.

The product of its digits is 14400, while the sum is 31.

The square root of 642531514 is about 25348.2053408126. The cubic root of 642531514 is about 862.9086273217.

The spelling of 642531514 in words is "six hundred forty-two million, five hundred thirty-one thousand, five hundred fourteen".