555261 has 16 divisors (see below), whose sum is σ = 856704. Its totient is φ = 313344.

The previous prime is 555257. The next prime is 555277. The reversal of 555261 is 162555.

555261 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 555261 - 2² = 555257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2781 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (53544).

2⁵⁵⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

555261 is a deficient number, since it is larger than the sum of its proper divisors (301443).

555261 is a wasteful number, since it uses less digits than its factorization.

555261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its digits is 1500, while the sum is 24.

The square root of 555261 is about 745.1583724283. The cubic root of 555261 is about 82.1925378465.

The spelling of 555261 in words is "five hundred fifty-five thousand, two hundred sixty-one".