25153987 has 4 divisors (see below), whose sum is σ = 25180560. Its totient is φ = 25127416.

The previous prime is 25153979. The next prime is 25153993. The reversal of 25153987 is 78935152.

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

It is a cyclic number.

It is not a de Polignac number, because 25153987 - 2³ = 25153979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25153957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11812 + ... + 13777.

It is an arithmetic number, because the mean of its divisors is an integer number (6295140).

Almost surely, 2^25153987 is an apocalyptic number.

25153987 is a deficient number, since it is larger than the sum of its proper divisors (26573).

25153987 is an equidigital number, since it uses as much as digits as its factorization.

25153987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26572.

The product of its digits is 75600, while the sum is 40.

The square root of 25153987 is about 5015.3750607507. The cubic root of 25153987 is about 293.0008930382. Note that the first 3 decimals are identical.

The spelling of 25153987 in words is "twenty-five million, one hundred fifty-three thousand, nine hundred eighty-seven".