2521979 has 2 divisors, whose sum is σ = 2521980. Its totient is φ = 2521978.

The previous prime is 2521969. The next prime is 2522011. The reversal of 2521979 is 9791252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2521979 - 2⁸ = 2521723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2521919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260989 + 1260990.

It is an arithmetic number, because the mean of its divisors is an integer number (1260990).

2^2521979 is an apocalyptic number.

2521979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521979 is an equidigital number, since it uses as much as digits as its factorization.

2521979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 2521979 is about 1588.0739907196. The cubic root of 2521979 is about 136.1174554804.

The spelling of 2521979 in words is "two million, five hundred twenty-one thousand, nine hundred seventy-nine".