625553 has 4 divisors (see below), whose sum is σ = 632100. Its totient is φ = 619008.

The previous prime is 625543. The next prime is 625589. The reversal of 625553 is 355526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355526 = 2 ⋅177763.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 146689 = 692^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 625553 - 2⁶ = 625489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128 + ... + 3321.

It is an arithmetic number, because the mean of its divisors is an integer number (158025).

2⁶²⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

625553 is a deficient number, since it is larger than the sum of its proper divisors (6547).

625553 is an equidigital number, since it uses as much as digits as its factorization.

625553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546.

The product of its digits is 4500, while the sum is 26.

The square root of 625553 is about 790.9190856213. The cubic root of 625553 is about 85.5240063456.

The spelling of 625553 in words is "six hundred twenty-five thousand, five hundred fifty-three".