25371561 has 8 divisors (see below), whose sum is σ = 34257280. Its totient is φ = 16700112.

The previous prime is 25371559. The next prime is 25371569. The reversal of 25371561 is 16517352.

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

It is not a de Polignac number, because 25371561 - 2¹ = 25371559 is a prime.

It is a super-2 number, since 2×25371561² = 1287432215153442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25371569) 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 7 ways as a sum of consecutive naturals, for example, 53290 + ... + 53763.

It is an arithmetic number, because the mean of its divisors is an integer number (4282160).

Almost surely, 2^25371561 is an apocalyptic number.

It is an amenable number.

25371561 is a deficient number, since it is larger than the sum of its proper divisors (8885719).

25371561 is a wasteful number, since it uses less digits than its factorization.

25371561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107135.

The product of its digits is 6300, while the sum is 30.

The square root of 25371561 is about 5037.0190589276. The cubic root of 25371561 is about 293.8432571868.

The spelling of 25371561 in words is "twenty-five million, three hundred seventy-one thousand, five hundred sixty-one".