25145139 has 8 divisors (see below), whose sum is σ = 33590992. Its totient is φ = 16731360.

The previous prime is 25145129. The next prime is 25145143. The reversal of 25145139 is 93154152.

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

It is not a de Polignac number, because 25145139 - 2⁷ = 25145011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25145129) 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, 6124 + ... + 9369.

It is an arithmetic number, because the mean of its divisors is an integer number (4198874).

Almost surely, 2^25145139 is an apocalyptic number.

25145139 is a deficient number, since it is larger than the sum of its proper divisors (8445853).

25145139 is a wasteful number, since it uses less digits than its factorization.

25145139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16037.

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

The square root of 25145139 is about 5014.4928955977. The cubic root of 25145139 is about 292.9665343242.

The spelling of 25145139 in words is "twenty-five million, one hundred forty-five thousand, one hundred thirty-nine".