25611401 has 4 divisors (see below), whose sum is σ = 27117972. Its totient is φ = 24104832.

The previous prime is 25611389. The next prime is 25611407. The reversal of 25611401 is 10411652.

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 23775376 + 1836025 = 4876^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 25611401 - 2¹⁸ = 25349257 is a prime.

It is a super-2 number, since 2×25611401² = 1311887722365602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25611407) 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 in 3 ways as a sum of consecutive naturals, for example, 753260 + ... + 753293.

It is an arithmetic number, because the mean of its divisors is an integer number (6779493).

Almost surely, 2^25611401 is an apocalyptic number.

It is an amenable number.

25611401 is a deficient number, since it is larger than the sum of its proper divisors (1506571).

25611401 is a wasteful number, since it uses less digits than its factorization.

25611401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506570.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 25611401 is about 5060.7707910950. The cubic root of 25611401 is about 294.7662651095.

The spelling of 25611401 in words is "twenty-five million, six hundred eleven thousand, four hundred one".