521959942 has 32 divisors (see below), whose sum is σ = 958874112. Its totient is φ = 207993984.

The previous prime is 521959913. The next prime is 521959943. The reversal of 521959942 is 249959125.

It is a junction number, because it is equal to n+sod(n) for n = 521959892 and 521959901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521959943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6543 + ... + 32965.

It is an arithmetic number, because the mean of its divisors is an integer number (29964816).

Almost surely, 2^521959942 is an apocalyptic number.

521959942 is a deficient number, since it is larger than the sum of its proper divisors (436914170).

521959942 is a wasteful number, since it uses less digits than its factorization.

521959942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26532.

The product of its digits is 291600, while the sum is 46.

The square root of 521959942 is about 22846.4426552582. The cubic root of 521959942 is about 805.1541913660.

The spelling of 521959942 in words is "five hundred twenty-one million, nine hundred fifty-nine thousand, nine hundred forty-two".