2525581 has 8 divisors (see below), whose sum is σ = 2650680. Its totient is φ = 2403072.

The previous prime is 2525569. The next prime is 2525591. The reversal of 2525581 is 1855252.

It can be written as a sum of positive squares in 4 ways, for example, as 469225 + 2056356 = 685^2 + 1434^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2525581 - 2¹¹ = 2523533 is a prime.

It is a super-2 number, since 2×2525581² = 12757118775122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2525531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521 + ... + 2713.

It is an arithmetic number, because the mean of its divisors is an integer number (331335).

2^2525581 is an apocalyptic number.

It is an amenable number.

2525581 is a deficient number, since it is larger than the sum of its proper divisors (125099).

2525581 is a wasteful number, since it uses less digits than its factorization.

2525581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295.

The product of its digits is 4000, while the sum is 28.

The square root of 2525581 is about 1589.2076642151. The cubic root of 2525581 is about 136.1822276084.

The spelling of 2525581 in words is "two million, five hundred twenty-five thousand, five hundred eighty-one".