556545 has 16 divisors (see below), whose sum is σ = 971712. Its totient is φ = 269760.

The previous prime is 556537. The next prime is 556559. The reversal of 556545 is 545655.

It is not a de Polignac number, because 556545 - 2³ = 556537 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (60732).

2⁵⁵⁶⁵⁴⁵ is an apocalyptic number.

556545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

556545 is a deficient number, since it is larger than the sum of its proper divisors (415167).

556545 is a wasteful number, since it uses less digits than its factorization.

556545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its digits is 15000, while the sum is 30.

The square root of 556545 is about 746.0194367441. The cubic root of 556545 is about 82.2558437966.

The spelling of 556545 in words is "five hundred fifty-six thousand, five hundred forty-five".