2500081 has 2 divisors, whose sum is σ = 2500082. Its totient is φ = 2500080.

The previous prime is 2500067. The next prime is 2500087. The reversal of 2500081 is 1800052.

It is a happy number.

2500081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1418481 + 1081600 = 1191^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500081 - 2⁵ = 2500049 is a prime.

It is a super-2 number, since 2×2500081² = 12500810013122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2500087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250040 + 1250041.

It is an arithmetic number, because the mean of its divisors is an integer number (1250041).

2^2500081 is an apocalyptic number.

It is an amenable number.

2500081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500081 is an equidigital number, since it uses as much as digits as its factorization.

2500081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2500081 is about 1581.1644443258. The cubic root of 2500081 is about 135.7223465994.

The spelling of 2500081 in words is "two million, five hundred thousand, eighty-one".