25047439 has 4 divisors (see below), whose sum is σ = 25152480. Its totient is φ = 24942400.

The previous prime is 25047419. The next prime is 25047461. The reversal of 25047439 is 93474052.

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 25047439 - 2¹³ = 25039247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25047419) 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, 52162 + ... + 52639.

It is an arithmetic number, because the mean of its divisors is an integer number (6288120).

Almost surely, 2^25047439 is an apocalyptic number.

25047439 is a deficient number, since it is larger than the sum of its proper divisors (105041).

25047439 is a wasteful number, since it uses less digits than its factorization.

25047439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105040.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 25047439 is about 5004.7416516739. The cubic root of 25047439 is about 292.5866069299.

The spelling of 25047439 in words is "twenty-five million, forty-seven thousand, four hundred thirty-nine".