25249690 has 8 divisors (see below), whose sum is σ = 45449460. Its totient is φ = 10099872.

The previous prime is 25249667. The next prime is 25249703. The reversal of 25249690 is 9694252.

It can be written as a sum of positive squares in 2 ways, for example, as 23435281 + 1814409 = 4841^2 + 1347^2 .

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

It is a super-2 number, since 2×25249690² = 1275093690192200, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1262475 + ... + 1262494.

Almost surely, 2^25249690 is an apocalyptic number.

25249690 is a deficient number, since it is larger than the sum of its proper divisors (20199770).

25249690 is a wasteful number, since it uses less digits than its factorization.

25249690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524976.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 25249690 is about 5024.9069643129. The cubic root of 25249690 is about 293.3720148140.

The spelling of 25249690 in words is "twenty-five million, two hundred forty-nine thousand, six hundred ninety".