251466 has 8 divisors (see below), whose sum is σ = 502944. Its totient is φ = 83820.

The previous prime is 251443. The next prime is 251467. The reversal of 251466 is 664152.

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

251466 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (251467) by changing a digit.

251466 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20950 + ... + 20961.

It is an arithmetic number, because the mean of its divisors is an integer number (62868).

2²⁵¹⁴⁶⁶ is an apocalyptic number.

251466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

251466 is a wasteful number, since it uses less digits than its factorization.

251466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41916.

The product of its digits is 1440, while the sum is 24.

The square root of 251466 is about 501.4638571223. The cubic root of 251466 is about 63.1189488694.

Subtracting 251466 from its reverse (664152), we obtain a triangular number (412686 = T₉₀₈).

It can be divided in two parts, 25146 and 6, that added together give a palindrome (25152).

The spelling of 251466 in words is "two hundred fifty-one thousand, four hundred sixty-six".