53421004 has 96 divisors (see below), whose sum is σ = 124467840. Its totient is φ = 19464192.

The previous prime is 53420963. The next prime is 53421013. The reversal of 53421004 is 40012435.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550684 + ... + 550780.

It is an arithmetic number, because the mean of its divisors is an integer number (1296540).

Almost surely, 2^53421004 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 53421004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62233920).

53421004 is an abundant number, since it is smaller than the sum of its proper divisors (71046836).

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

53421004 is a wasteful number, since it uses less digits than its factorization.

53421004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 53421004 is about 7308.9673689243. The cubic root of 53421004 is about 376.6205517808.

Adding to 53421004 its reverse (40012435), we get a palindrome (93433439).

The spelling of 53421004 in words is "fifty-three million, four hundred twenty-one thousand, four".