2972021 has 4 divisors (see below), whose sum is σ = 3200652. Its totient is φ = 2743392.

The previous prime is 2971993. The next prime is 2972027. The reversal of 2972021 is 1202792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 2283121 = 830^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2972021 - 2¹⁸ = 2709877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972027) 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, 114296 + ... + 114321.

It is an arithmetic number, because the mean of its divisors is an integer number (800163).

2^2972021 is an apocalyptic number.

It is an amenable number.

2972021 is a deficient number, since it is larger than the sum of its proper divisors (228631).

2972021 is a wasteful number, since it uses less digits than its factorization.

2972021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228630.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2972021 is about 1723.9550458176. The cubic root of 2972021 is about 143.7751925601.

The spelling of 2972021 in words is "two million, nine hundred seventy-two thousand, twenty-one".