2372391 has 12 divisors (see below), whose sum is σ = 3916432. Its totient is φ = 1355616.

The previous prime is 2372371. The next prime is 2372393. The reversal of 2372391 is 1932732.

It is not a de Polignac number, because 2372391 - 2⁶ = 2372327 is a prime.

It is an Ulam number.

It is a Duffinian number.

2372391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2372393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18766 + ... + 18891.

2^2372391 is an apocalyptic number.

2372391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2372391 is a deficient number, since it is larger than the sum of its proper divisors (1544041).

2372391 is a wasteful number, since it uses less digits than its factorization.

2372391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37670 (or 37667 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 2372391 is about 1540.2567967712. The cubic root of 2372391 is about 133.3712093784.

It can be divided in two parts, 237 and 2391, that added together give a triangular number (2628 = T₇₂).

The spelling of 2372391 in words is "two million, three hundred seventy-two thousand, three hundred ninety-one".