2572391 has 4 divisors (see below), whose sum is σ = 2707800. Its totient is φ = 2436984.

The previous prime is 2572379. The next prime is 2572393. The reversal of 2572391 is 1932752.

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 2572391 - 2⁶ = 2572327 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 (2572393) 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, 67676 + ... + 67713.

It is an arithmetic number, because the mean of its divisors is an integer number (676950).

2^2572391 is an apocalyptic number.

2572391 is a deficient number, since it is larger than the sum of its proper divisors (135409).

2572391 is a wasteful number, since it uses less digits than its factorization.

2572391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135408.

The product of its digits is 3780, while the sum is 29.

The square root of 2572391 is about 1603.8675132317. The cubic root of 2572391 is about 137.0184321729.

The spelling of 2572391 in words is "two million, five hundred seventy-two thousand, three hundred ninety-one".