2391251 has 4 divisors (see below), whose sum is σ = 2421600. Its totient is φ = 2360904.

The previous prime is 2391239. The next prime is 2391269. The reversal of 2391251 is 1521932.

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

It is a cyclic number.

It is not a de Polignac number, because 2391251 - 2¹⁸ = 2129107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391281) 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, 15056 + ... + 15213.

It is an arithmetic number, because the mean of its divisors is an integer number (605400).

2^2391251 is an apocalyptic number.

2391251 is a deficient number, since it is larger than the sum of its proper divisors (30349).

2391251 is an equidigital number, since it uses as much as digits as its factorization.

2391251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30348.

The product of its digits is 540, while the sum is 23.

The square root of 2391251 is about 1546.3670327577. The cubic root of 2391251 is about 133.7237011209.

The spelling of 2391251 in words is "two million, three hundred ninety-one thousand, two hundred fifty-one".