421302524 has 12 divisors (see below), whose sum is σ = 761062848. Its totient is φ = 203856000.

The previous prime is 421302509. The next prime is 421302529. The reversal of 421302524 is 425203124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421302524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421302529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698677 + ... + 1698924.

It is an arithmetic number, because the mean of its divisors is an integer number (63421904).

Almost surely, 2^421302524 is an apocalyptic number.

It is an amenable number.

421302524 is a deficient number, since it is larger than the sum of its proper divisors (339760324).

421302524 is a wasteful number, since it uses less digits than its factorization.

421302524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397636 (or 3397634 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421302524 is about 20525.6552635963. The cubic root of 421302524 is about 749.6606013976.

Adding to 421302524 its reverse (425203124), we get a palindrome (846505648).

The spelling of 421302524 in words is "four hundred twenty-one million, three hundred two thousand, five hundred twenty-four".