451403 has 4 divisors (see below), whose sum is σ = 452760. Its totient is φ = 450048.

The previous prime is 451397. The next prime is 451411. The reversal of 451403 is 304154.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 304154 = 2 ⋅152077.

It is a cyclic number.

It is not a de Polignac number, because 451403 - 2⁴ = 451387 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 451403.

It is not an unprimeable number, because it can be changed into a prime (451103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (113190).

2⁴⁵¹⁴⁰³ is an apocalyptic number.

451403 is a deficient number, since it is larger than the sum of its proper divisors (1357).

451403 is an equidigital number, since it uses as much as digits as its factorization.

451403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 451403 is about 671.8653138837. The cubic root of 451403 is about 76.7105000337.

Adding to 451403 its reverse (304154), we get a palindrome (755557).

The spelling of 451403 in words is "four hundred fifty-one thousand, four hundred three".