2521851 has 16 divisors (see below), whose sum is σ = 3575040. Its totient is φ = 1576800.

The previous prime is 2521847. The next prime is 2521901. The reversal of 2521851 is 1581252.

It is not a de Polignac number, because 2521851 - 2² = 2521847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2521451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8461 + ... + 8753.

It is an arithmetic number, because the mean of its divisors is an integer number (223440).

2^2521851 is an apocalyptic number.

2521851 is a deficient number, since it is larger than the sum of its proper divisors (1053189).

2521851 is a wasteful number, since it uses less digits than its factorization.

2521851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 800, while the sum is 24.

The square root of 2521851 is about 1588.0336898190. The cubic root of 2521851 is about 136.1151526157.

The spelling of 2521851 in words is "two million, five hundred twenty-one thousand, eight hundred fifty-one".