521402060 has 24 divisors (see below), whose sum is σ = 1095444000. Its totient is φ = 208465664.

The previous prime is 521402059. The next prime is 521402069. The reversal of 521402060 is 60204125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (521402069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53441 + ... + 62439.

It is an arithmetic number, because the mean of its divisors is an integer number (45643500).

Almost surely, 2^521402060 is an apocalyptic number.

It is an amenable number.

521402060 is an abundant number, since it is smaller than the sum of its proper divisors (574041940).

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

521402060 is a wasteful number, since it uses less digits than its factorization.

521402060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11905 (or 11903 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 521402060 is about 22834.2300067246. The cubic root of 521402060 is about 804.8672337402.

Adding to 521402060 its reverse (60204125), we get a palindrome (581606185).

The spelling of 521402060 in words is "five hundred twenty-one million, four hundred two thousand, sixty".