981255 has 32 divisors (see below), whose sum is σ = 1808640. Its totient is φ = 449280.

The previous prime is 981241. The next prime is 981263. The reversal of 981255 is 552189.

981255 = 441² + 442² + ... + 445².

It is not a de Polignac number, because 981255 - 2⁸ = 980999 is a prime.

It is a super-2 number, since 2×981255² = 1925722750050, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981255.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2979 + ... + 3291.

It is an arithmetic number, because the mean of its divisors is an integer number (56520).

2⁹⁸¹²⁵⁵ is an apocalyptic number.

981255 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

981255 is a deficient number, since it is larger than the sum of its proper divisors (827385).

981255 is a wasteful number, since it uses less digits than its factorization.

981255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 3600, while the sum is 30.

The square root of 981255 is about 990.5831615771. The cubic root of 981255 is about 99.3712213270.

The spelling of 981255 in words is "nine hundred eighty-one thousand, two hundred fifty-five".