955581 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 553520.

The previous prime is 955541. The next prime is 955601. The reversal of 955581 is 185559.

It is not a de Polignac number, because 955581 - 2¹³ = 947389 is a prime.

It is a super-2 number, since 2×955581² = 1826270095122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

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 955581.

It is not an unprimeable number, because it can be changed into a prime (955501) 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, 130 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁹⁵⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

955581 is a deficient number, since it is larger than the sum of its proper divisors (495939).

955581 is a wasteful number, since it uses less digits than its factorization.

955581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296.

The product of its digits is 9000, while the sum is 33.

The square root of 955581 is about 977.5382345464. The cubic root of 955581 is about 98.4968863626.

It can be divided in two parts, 95558 and 1, that added together give a palindrome (95559).

The spelling of 955581 in words is "nine hundred fifty-five thousand, five hundred eighty-one".