2521867 has 4 divisors (see below), whose sum is σ = 2537136. Its totient is φ = 2506600.

The previous prime is 2521847. The next prime is 2521901. The reversal of 2521867 is 7681252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521807) 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, 7384 + ... + 7717.

It is an arithmetic number, because the mean of its divisors is an integer number (634284).

2^2521867 is an apocalyptic number.

2521867 is a deficient number, since it is larger than the sum of its proper divisors (15269).

2521867 is a wasteful number, since it uses less digits than its factorization.

2521867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15268.

The product of its digits is 6720, while the sum is 31.

The square root of 2521867 is about 1588.0387274875. The cubic root of 2521867 is about 136.1154404781.

The spelling of 2521867 in words is "two million, five hundred twenty-one thousand, eight hundred sixty-seven".