2521972 has 6 divisors (see below), whose sum is σ = 4413458. Its totient is φ = 1260984.

The previous prime is 2521969. The next prime is 2521979. The reversal of 2521972 is 2791252.

It can be written as a sum of positive squares in only one way, i.e., 2178576 + 343396 = 1476^2 + 586^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2521972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521979) by changing a digit.

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 as a sum of consecutive naturals, namely, 315243 + ... + 315250.

2^2521972 is an apocalyptic number.

It is an amenable number.

2521972 is a deficient number, since it is larger than the sum of its proper divisors (1891486).

2521972 is a wasteful number, since it uses less digits than its factorization.

2521972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630497 (or 630495 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 2521972 is about 1588.0717867905. The cubic root of 2521972 is about 136.1173295445.

The spelling of 2521972 in words is "two million, five hundred twenty-one thousand, nine hundred seventy-two".