251261146 has 8 divisors (see below), whose sum is σ = 376977024. Its totient is φ = 125602140.

The previous prime is 251261141. The next prime is 251261147. The reversal of 251261146 is 641162152.

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

It is not an unprimeable number, because it can be changed into a prime (251261141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540 + ... + 22423.

It is an arithmetic number, because the mean of its divisors is an integer number (47122128).

Almost surely, 2^251261146 is an apocalyptic number.

251261146 is a deficient number, since it is larger than the sum of its proper divisors (125715878).

251261146 is a wasteful number, since it uses less digits than its factorization.

251261146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28436.

The product of its digits is 2880, while the sum is 28.

The square root of 251261146 is about 15851.2190698381. The cubic root of 251261146 is about 631.0180449480.

The spelling of 251261146 in words is "two hundred fifty-one million, two hundred sixty-one thousand, one hundred forty-six".