2972521 has 4 divisors (see below), whose sum is σ = 2995344. Its totient is φ = 2949700.

The previous prime is 2972507. The next prime is 2972527. The reversal of 2972521 is 1252792.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2972521 - 2¹⁵ = 2939753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2972521.

It is not an unprimeable number, because it can be changed into a prime (2972527) 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 in 3 ways as a sum of consecutive naturals, for example, 11215 + ... + 11476.

It is an arithmetic number, because the mean of its divisors is an integer number (748836).

2^2972521 is an apocalyptic number.

It is an amenable number.

2972521 is a deficient number, since it is larger than the sum of its proper divisors (22823).

2972521 is a wasteful number, since it uses less digits than its factorization.

2972521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22822.

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

The square root of 2972521 is about 1724.1000551012. The cubic root of 2972521 is about 143.7832548142.

The spelling of 2972521 in words is "two million, nine hundred seventy-two thousand, five hundred twenty-one".