25140515 has 8 divisors (see below), whose sum is σ = 31756560. Its totient is φ = 19053792.

The previous prime is 25140499. The next prime is 25140517. The reversal of 25140515 is 51504152.

It is a happy number.

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 25140515 - 2⁴ = 25140499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25140517) 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, 132224 + ... + 132413.

It is an arithmetic number, because the mean of its divisors is an integer number (3969570).

Almost surely, 2^25140515 is an apocalyptic number.

25140515 is a deficient number, since it is larger than the sum of its proper divisors (6616045).

25140515 is a wasteful number, since it uses less digits than its factorization.

25140515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264661.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 25140515 is about 5014.0318108285. The cubic root of 25140515 is about 292.9485751168.

Adding to 25140515 its reverse (51504152), we get a palindrome (76644667).

The spelling of 25140515 in words is "twenty-five million, one hundred forty thousand, five hundred fifteen".