451404 has 18 divisors (see below), whose sum is σ = 1141140. Its totient is φ = 150456.

The previous prime is 451397. The next prime is 451411. The reversal of 451404 is 404154.

It is an interprime number because it is at equal distance from previous prime (451397) and next prime (451411).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 451404.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6234 + ... + 6305.

2⁴⁵¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

451404 is an abundant number, since it is smaller than the sum of its proper divisors (689736).

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

451404 is a wasteful number, since it uses less digits than its factorization.

451404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12549 (or 12544 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 451404 is about 671.8660580800. The cubic root of 451404 is about 76.7105566797.

Adding to 451404 its reverse (404154), we get a palindrome (855558).

The spelling of 451404 in words is "four hundred fifty-one thousand, four hundred four".