25001251257 has 8 divisors (see below), whose sum is σ = 33335949376. Its totient is φ = 16667026992.

The previous prime is 25001251153. The next prime is 25001251309. The reversal of 25001251257 is 75215210052.

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

It is not a de Polignac number, because 25001251257 - 2¹⁶ = 25001185721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25001251057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31923 + ... + 225879.

It is an arithmetic number, because the mean of its divisors is an integer number (4166993672).

Almost surely, 2^25001251257 is an apocalyptic number.

It is an amenable number.

25001251257 is a deficient number, since it is larger than the sum of its proper divisors (8334698119).

25001251257 is a wasteful number, since it uses less digits than its factorization.

25001251257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236927.

The product of its (nonzero) digits is 7000, while the sum is 30.

The spelling of 25001251257 in words is "twenty-five billion, one million, two hundred fifty-one thousand, two hundred fifty-seven".