521497142 has 16 divisors (see below), whose sum is σ = 829348800. Its totient is φ = 245245320.

The previous prime is 521497139. The next prime is 521497153. The reversal of 521497142 is 241794125.

It is a super-2 number, since 2×521497142² = 543918538228336328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44084 + ... + 54647.

It is an arithmetic number, because the mean of its divisors is an integer number (51834300).

Almost surely, 2^521497142 is an apocalyptic number.

521497142 is a deficient number, since it is larger than the sum of its proper divisors (307851658).

521497142 is a wasteful number, since it uses less digits than its factorization.

521497142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98891.

The product of its digits is 20160, while the sum is 35.

The square root of 521497142 is about 22836.3119176455. The cubic root of 521497142 is about 804.9161555101.

The spelling of 521497142 in words is "five hundred twenty-one million, four hundred ninety-seven thousand, one hundred forty-two".