25287501 has 4 divisors (see below), whose sum is σ = 33716672. Its totient is φ = 16858332.

The previous prime is 25287467. The next prime is 25287503. The reversal of 25287501 is 10578252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25287501 - 2¹⁷ = 25156429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25287503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214581 + ... + 4214586.

It is an arithmetic number, because the mean of its divisors is an integer number (8429168).

Almost surely, 2^25287501 is an apocalyptic number.

It is an amenable number.

25287501 is a deficient number, since it is larger than the sum of its proper divisors (8429171).

25287501 is an equidigital number, since it uses as much as digits as its factorization.

25287501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429170.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25287501 is about 5028.6679150646. The cubic root of 25287501 is about 293.5183817174.

The spelling of 25287501 in words is "twenty-five million, two hundred eighty-seven thousand, five hundred one".