521420360 has 64 divisors (see below), whose sum is σ = 1200225600. Its totient is φ = 203796736.

The previous prime is 521420353. The next prime is 521420369. The reversal of 521420360 is 63024125.

It is not an unprimeable number, because it can be changed into a prime (521420369) 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, 887987 + ... + 888573.

It is an arithmetic number, because the mean of its divisors is an integer number (18753525).

Almost surely, 2^521420360 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521420360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600112800).

521420360 is an abundant number, since it is smaller than the sum of its proper divisors (678805240).

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

521420360 is a wasteful number, since it uses less digits than its factorization.

521420360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 521420360 is about 22834.6307173994. The cubic root of 521420360 is about 804.8766499528.

Adding to 521420360 its reverse (63024125), we get a palindrome (584444485).

The spelling of 521420360 in words is "five hundred twenty-one million, four hundred twenty thousand, three hundred sixty".