451881 has 24 divisors (see below), whose sum is σ = 711360. Its totient is φ = 275616.

The previous prime is 451879. The next prime is 451897. The reversal of 451881 is 188154.

It is not a de Polignac number, because 451881 - 2¹ = 451879 is a prime.

It is a super-2 number, since 2×451881² = 408392876322, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (451831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7630 + ... + 7688.

It is an arithmetic number, because the mean of its divisors is an integer number (29640).

2⁴⁵¹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

451881 is a deficient number, since it is larger than the sum of its proper divisors (259479).

451881 is a wasteful number, since it uses less digits than its factorization.

451881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 122 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 451881 is about 672.2209458206. The cubic root of 451881 is about 76.7375672618.

The spelling of 451881 in words is "four hundred fifty-one thousand, eight hundred eighty-one".