25525601 has 4 divisors (see below), whose sum is σ = 25658052. Its totient is φ = 25393152.

The previous prime is 25525589. The next prime is 25525609. The reversal of 25525601 is 10652552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16192576 + 9333025 = 4024^2 + 3055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25525601 is a prime.

It is a super-2 number, since 2×25525601² = 1303112612822402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25525609) 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 in 3 ways as a sum of consecutive naturals, for example, 65936 + ... + 66321.

It is an arithmetic number, because the mean of its divisors is an integer number (6414513).

Almost surely, 2^25525601 is an apocalyptic number.

It is an amenable number.

25525601 is a deficient number, since it is larger than the sum of its proper divisors (132451).

25525601 is a wasteful number, since it uses less digits than its factorization.

25525601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132450.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 25525601 is about 5052.2867099958. The cubic root of 25525601 is about 294.4367342574.

The spelling of 25525601 in words is "twenty-five million, five hundred twenty-five thousand, six hundred one".