25139145 has 8 divisors (see below), whose sum is σ = 40222656. Its totient is φ = 13407536.

The previous prime is 25139129. The next prime is 25139159. The reversal of 25139145 is 54193152.

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 25139145 - 2⁴ = 25139129 is a prime.

It is a super-2 number, since 2×25139145² = 1263953222662050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837957 + ... + 837986.

It is an arithmetic number, because the mean of its divisors is an integer number (5027832).

Almost surely, 2^25139145 is an apocalyptic number.

It is an amenable number.

25139145 is a deficient number, since it is larger than the sum of its proper divisors (15083511).

25139145 is a wasteful number, since it uses less digits than its factorization.

25139145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675951.

The product of its digits is 5400, while the sum is 30.

The square root of 25139145 is about 5013.8951923629. The cubic root of 25139145 is about 292.9432537350.

The spelling of 25139145 in words is "twenty-five million, one hundred thirty-nine thousand, one hundred forty-five".