642274526 has 8 divisors (see below), whose sum is σ = 965493984. Its totient is φ = 320443200.

The previous prime is 642274487. The next prime is 642274559. The reversal of 642274526 is 625472246.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642274526.

It is a congruent number.

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, 345875 + ... + 347726.

It is an arithmetic number, because the mean of its divisors is an integer number (120686748).

Almost surely, 2^642274526 is an apocalyptic number.

642274526 is a deficient number, since it is larger than the sum of its proper divisors (323219458).

642274526 is a wasteful number, since it uses less digits than its factorization.

642274526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694066.

The product of its digits is 161280, while the sum is 38.

The square root of 642274526 is about 25343.1356781279. The cubic root of 642274526 is about 862.7935685120.

The spelling of 642274526 in words is "six hundred forty-two million, two hundred seventy-four thousand, five hundred twenty-six".