2577881 has 2 divisors, whose sum is σ = 2577882. Its totient is φ = 2577880.

The previous prime is 2577877. The next prime is 2577889. The reversal of 2577881 is 1887752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 33856 = 1595^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2577881 - 2² = 2577877 is a prime.

It is a super-2 number, since 2×2577881² = 13290940900322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2577889) 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, 1288940 + 1288941.

It is an arithmetic number, because the mean of its divisors is an integer number (1288941).

2^2577881 is an apocalyptic number.

It is an amenable number.

2577881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2577881 is an equidigital number, since it uses as much as digits as its factorization.

2577881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 38.

The square root of 2577881 is about 1605.5780890383. The cubic root of 2577881 is about 137.1158378794.

The spelling of 2577881 in words is "two million, five hundred seventy-seven thousand, eight hundred eighty-one".