521461020 has 48 divisors (see below), whose sum is σ = 1461156480. Its totient is φ = 138954816.

The previous prime is 521461019. The next prime is 521461021. The reversal of 521461020 is 20164125.

It is an interprime number because it is at equal distance from previous prime (521461019) and next prime (521461021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521461021) 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, 118011 + ... + 122349.

It is an arithmetic number, because the mean of its divisors is an integer number (30440760).

Almost surely, 2^521461020 is an apocalyptic number.

It is an amenable number.

521461020 is an abundant number, since it is smaller than the sum of its proper divisors (939695460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521461020 is a wasteful number, since it uses less digits than its factorization.

521461020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354 (or 6352 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 521461020 is about 22835.5210144196. The cubic root of 521461020 is about 804.8975706511.

The spelling of 521461020 in words is "five hundred twenty-one million, four hundred sixty-one thousand, twenty".