2372021 has 4 divisors (see below), whose sum is σ = 2377344. Its totient is φ = 2366700.

The previous prime is 2372011. The next prime is 2372023. The reversal of 2372021 is 1202732.

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 a de Polignac number, because none of the positive numbers 2^k-2372021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2372023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (594336).

2^2372021 is an apocalyptic number.

It is an amenable number.

2372021 is a deficient number, since it is larger than the sum of its proper divisors (5323).

2372021 is an equidigital number, since it uses as much as digits as its factorization.

2372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2372021 is about 1540.1366822461. The cubic root of 2372021 is about 133.3642754577.

Adding to 2372021 its reverse (1202732), we get a palindrome (3574753).

The spelling of 2372021 in words is "two million, three hundred seventy-two thousand, twenty-one".