25772499 has 10 divisors (see below), whose sum is σ = 38499780. Its totient is φ = 17181612.

The previous prime is 25772423. The next prime is 25772533. The reversal of 25772499 is 99427752.

It is not a de Polignac number, because 25772499 - 2¹² = 25768403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25773499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159009 + ... + 159170.

It is an arithmetic number, because the mean of its divisors is an integer number (3849978).

Almost surely, 2^25772499 is an apocalyptic number.

25772499 is a deficient number, since it is larger than the sum of its proper divisors (12727281).

25772499 is an equidigital number, since it uses as much as digits as its factorization.

25772499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318191 (or 318182 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 25772499 is about 5076.6621908494. The cubic root of 25772499 is about 295.3830091653.

The spelling of 25772499 in words is "twenty-five million, seven hundred seventy-two thousand, four hundred ninety-nine".