25201690 has 8 divisors (see below), whose sum is σ = 45363060. Its totient is φ = 10080672.

The previous prime is 25201681. The next prime is 25201739. The reversal of 25201690 is 9610252.

It can be written as a sum of positive squares in 2 ways, for example, as 23049601 + 2152089 = 4801^2 + 1467^2 .

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

It is a super-2 number, since 2×25201690² = 1270250357712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260075 + ... + 1260094.

Almost surely, 2^25201690 is an apocalyptic number.

25201690 is a deficient number, since it is larger than the sum of its proper divisors (20161370).

25201690 is a wasteful number, since it uses less digits than its factorization.

25201690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520176.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 25201690 is about 5020.1284844115. The cubic root of 25201690 is about 293.1859955082.

The spelling of 25201690 in words is "twenty-five million, two hundred one thousand, six hundred ninety".