25742166 has 16 divisors (see below), whose sum is σ = 51591600. Its totient is φ = 8562848.

The previous prime is 25742159. The next prime is 25742179. The reversal of 25742166 is 66124752.

It is a super-2 number, since 2×25742166² = 1325318220743112, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (3224475).

Almost surely, 2^25742166 is an apocalyptic number.

25742166 is an abundant number, since it is smaller than the sum of its proper divisors (25849434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25742166 is a wasteful number, since it uses less digits than its factorization.

25742166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8943.

The product of its digits is 20160, while the sum is 33.

The square root of 25742166 is about 5073.6738168708. The cubic root of 25742166 is about 295.2670797758.

The spelling of 25742166 in words is "twenty-five million, seven hundred forty-two thousand, one hundred sixty-six".