25262749 has 4 divisors (see below), whose sum is σ = 25945564. Its totient is φ = 24579936.

The previous prime is 25262747. The next prime is 25262773. The reversal of 25262749 is 94726252.

It is a happy number.

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 19740249 + 5522500 = 4443^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 25262749 - 2¹ = 25262747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 682777 = 25262749 / (2 + 5 + 2 + 6 + 2 + 7 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25262747) 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, 341352 + ... + 341425.

It is an arithmetic number, because the mean of its divisors is an integer number (6486391).

Almost surely, 2^25262749 is an apocalyptic number.

It is an amenable number.

25262749 is a deficient number, since it is larger than the sum of its proper divisors (682815).

25262749 is an equidigital number, since it uses as much as digits as its factorization.

25262749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682814.

The product of its digits is 60480, while the sum is 37.

The square root of 25262749 is about 5026.2062233856. The cubic root of 25262749 is about 293.4225828915.

It can be divided in two parts, 252 and 62749, that added together give a square (63001 = 251²).

The spelling of 25262749 in words is "twenty-five million, two hundred sixty-two thousand, seven hundred forty-nine".