52921040 has 20 divisors (see below), whose sum is σ = 123041604. Its totient is φ = 21168384.

The previous prime is 52921039. The next prime is 52921067. The reversal of 52921040 is 4012925.

It can be written as a sum of positive squares in 2 ways, for example, as 37112464 + 15808576 = 6092^2 + 3976^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 52920997 and 52921015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330677 + ... + 330836.

Almost surely, 2^52921040 is an apocalyptic number.

It is an amenable number.

52921040 is an abundant number, since it is smaller than the sum of its proper divisors (70120564).

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

52921040 is a wasteful number, since it uses less digits than its factorization.

52921040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661526 (or 661520 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 52921040 is about 7274.6848729000. The cubic root of 52921040 is about 375.4419441416.

Adding to 52921040 its reverse (4012925), we get a palindrome (56933965).

The spelling of 52921040 in words is "fifty-two million, nine hundred twenty-one thousand, forty".