25026139 has 4 divisors (see below), whose sum is σ = 26114256. Its totient is φ = 23938024.

The previous prime is 25026107. The next prime is 25026143. The reversal of 25026139 is 93162052.

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 25026139 - 2⁵ = 25026107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25026179) 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, 544024 + ... + 544069.

It is an arithmetic number, because the mean of its divisors is an integer number (6528564).

Almost surely, 2^25026139 is an apocalyptic number.

25026139 is a deficient number, since it is larger than the sum of its proper divisors (1088117).

25026139 is a wasteful number, since it uses less digits than its factorization.

25026139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088116.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 25026139 is about 5002.6132171096. The cubic root of 25026139 is about 292.5036461912.

The spelling of 25026139 in words is "twenty-five million, twenty-six thousand, one hundred thirty-nine".