25039515 has 8 divisors (see below), whose sum is σ = 40063248. Its totient is φ = 13354400.

The previous prime is 25039481. The next prime is 25039519. The reversal of 25039515 is 51593052.

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

It is not a de Polignac number, because 25039515 - 2¹² = 25035419 is a prime.

It is a super-2 number, since 2×25039515² = 1253954622870450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25039519) 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, 834636 + ... + 834665.

It is an arithmetic number, because the mean of its divisors is an integer number (5007906).

Almost surely, 2^25039515 is an apocalyptic number.

25039515 is a deficient number, since it is larger than the sum of its proper divisors (15023733).

25039515 is a wasteful number, since it uses less digits than its factorization.

25039515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669309.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 25039515 is about 5003.9499397976. The cubic root of 25039515 is about 292.5557494730. Note that the first 3 decimals are identical.

The spelling of 25039515 in words is "twenty-five million, thirty-nine thousand, five hundred fifteen".