25287797 has 4 divisors (see below), whose sum is σ = 26159820. Its totient is φ = 24415776.

The previous prime is 25287793. The next prime is 25287799. The reversal of 25287797 is 79778252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 20421361 = 2206^2 + 4519^2 .

It is a cyclic number.

It is not a de Polignac number, because 25287797 - 2² = 25287793 is a prime.

It is a super-2 number, since 2×25287797² = 1278945354226418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25287793) 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, 435968 + ... + 436025.

It is an arithmetic number, because the mean of its divisors is an integer number (6539955).

Almost surely, 2^25287797 is an apocalyptic number.

It is an amenable number.

25287797 is a deficient number, since it is larger than the sum of its proper divisors (872023).

25287797 is an equidigital number, since it uses as much as digits as its factorization.

25287797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872022.

The product of its digits is 493920, while the sum is 47.

The square root of 25287797 is about 5028.6973462319. The cubic root of 25287797 is about 293.5195269617.

The spelling of 25287797 in words is "twenty-five million, two hundred eighty-seven thousand, seven hundred ninety-seven".