25139155 has 8 divisors (see below), whose sum is σ = 30194352. Its totient is φ = 20093088.

The previous prime is 25139129. The next prime is 25139159. The reversal of 25139155 is 55193152.

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 25139155 - 2⁹ = 25138643 is a prime.

It is a super-2 number, since 2×25139155² = 1263954228228050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25139159) 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, 7989 + ... + 10681.

It is an arithmetic number, because the mean of its divisors is an integer number (3774294).

Almost surely, 2^25139155 is an apocalyptic number.

25139155 is a deficient number, since it is larger than the sum of its proper divisors (5055197).

25139155 is a wasteful number, since it uses less digits than its factorization.

25139155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565.

The product of its digits is 6750, while the sum is 31.

The square root of 25139155 is about 5013.8961895915. The cubic root of 25139155 is about 292.9432925779.

The spelling of 25139155 in words is "twenty-five million, one hundred thirty-nine thousand, one hundred fifty-five".