2521869 has 32 divisors (see below), whose sum is σ = 4112640. Its totient is φ = 1344000.

The previous prime is 2521847. The next prime is 2521901. The reversal of 2521869 is 9681252.

It is not a de Polignac number, because 2521869 - 2⁸ = 2521613 is a prime.

It is a super-2 number, since 2×2521869² = 12719646506322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24919 + ... + 25019.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2^2521869 is an apocalyptic number.

2521869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2521869 is a deficient number, since it is larger than the sum of its proper divisors (1590771).

2521869 is a wasteful number, since it uses less digits than its factorization.

2521869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 8640, while the sum is 33.

The square root of 2521869 is about 1588.0393571949. The cubic root of 2521869 is about 136.1154764608.

The spelling of 2521869 in words is "two million, five hundred twenty-one thousand, eight hundred sixty-nine".