2425581 has 12 divisors (see below), whose sum is σ = 3525340. Its totient is φ = 1607040.

The previous prime is 2425567. The next prime is 2425613. The reversal of 2425581 is 1855242.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 2223081 = 450^2 + 1491^2 .

It is not a de Polignac number, because 2425581 - 2⁷ = 2425453 is a prime.

It is a super-2 number, since 2×2425581² = 11766886375122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2425541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 885 + ... + 2373.

2^2425581 is an apocalyptic number.

It is an amenable number.

2425581 is a deficient number, since it is larger than the sum of its proper divisors (1099759).

2425581 is a wasteful number, since it uses less digits than its factorization.

2425581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 1673 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2425581 is about 1557.4276869248. The cubic root of 2425581 is about 134.3605977714.

It can be divided in two parts, 24255 and 81, that added together give a square (24336 = 156²).

The spelling of 2425581 in words is "two million, four hundred twenty-five thousand, five hundred eighty-one".