2517881 has 2 divisors, whose sum is σ = 2517882. Its totient is φ = 2517880.

The previous prime is 2517877. The next prime is 2517901. The reversal of 2517881 is 1887152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2418025 + 99856 = 1555^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 2517881 - 2² = 2517877 is a prime.

It is a super-2 number, since 2×2517881² = 12679449460322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2517811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258940 + 1258941.

It is an arithmetic number, because the mean of its divisors is an integer number (1258941).

2^2517881 is an apocalyptic number.

It is an amenable number.

2517881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2517881 is an equidigital number, since it uses as much as digits as its factorization.

2517881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 32.

The square root of 2517881 is about 1586.7832240101. The cubic root of 2517881 is about 136.0436891067.

The spelling of 2517881 in words is "two million, five hundred seventeen thousand, eight hundred eighty-one".