52121240 has 16 divisors (see below), whose sum is σ = 117272880. Its totient is φ = 20848480.

The previous prime is 52121221. The next prime is 52121257. The reversal of 52121240 is 4212125.

52121240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651476 + ... + 651555.

It is an arithmetic number, because the mean of its divisors is an integer number (7329555).

Almost surely, 2^52121240 is an apocalyptic number.

It is an amenable number.

52121240 is an abundant number, since it is smaller than the sum of its proper divisors (65151640).

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

52121240 is a wasteful number, since it uses less digits than its factorization.

52121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303042 (or 1303038 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 52121240 is about 7219.5041380970. The cubic root of 52121240 is about 373.5409736373.

Adding to 52121240 its reverse (4212125), we get a palindrome (56333365).

The spelling of 52121240 in words is "fifty-two million, one hundred twenty-one thousand, two hundred forty".