521274634 has 4 divisors (see below), whose sum is σ = 781911954. Its totient is φ = 260637316.

The previous prime is 521274629. The next prime is 521274643. The reversal of 521274634 is 436472125.

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

It can be written as a sum of positive squares in only one way, i.e., 329313609 + 191961025 = 18147^2 + 13855^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 521274634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130318657 + ... + 130318660.

Almost surely, 2^521274634 is an apocalyptic number.

521274634 is a deficient number, since it is larger than the sum of its proper divisors (260637320).

521274634 is a wasteful number, since it uses less digits than its factorization.

521274634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260637319.

The product of its digits is 40320, while the sum is 34.

The square root of 521274634 is about 22831.4395954351. The cubic root of 521274634 is about 804.8016609470.

The spelling of 521274634 in words is "five hundred twenty-one million, two hundred seventy-four thousand, six hundred thirty-four".