556451 has 4 divisors (see below), whose sum is σ = 635952. Its totient is φ = 476952.

The previous prime is 556441. The next prime is 556459. The reversal of 556451 is 154655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154655 = 5 ⋅30931.

It is a de Polignac number, because none of the positive numbers 2^k-556451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556451.

It is not an unprimeable number, because it can be changed into a prime (556459) 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, 39740 + ... + 39753.

It is an arithmetic number, because the mean of its divisors is an integer number (158988).

2⁵⁵⁶⁴⁵¹ is an apocalyptic number.

556451 is a deficient number, since it is larger than the sum of its proper divisors (79501).

556451 is an equidigital number, since it uses as much as digits as its factorization.

556451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79500.

The product of its digits is 3000, while the sum is 26.

The square root of 556451 is about 745.9564330442. The cubic root of 556451 is about 82.2512125541.

The spelling of 556451 in words is "five hundred fifty-six thousand, four hundred fifty-one".