961155 has 48 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 449280.

The previous prime is 961151. The next prime is 961157. The reversal of 961155 is 551169.

961155 = 106² + 107² + ... + 159².

961155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 961155 - 2² = 961151 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 961155.

It is not an unprimeable number, because it can be changed into a prime (961151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18109 + ... + 18161.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2⁹⁶¹¹⁵⁵ is an apocalyptic number.

961155 is a deficient number, since it is larger than the sum of its proper divisors (925821).

961155 is a wasteful number, since it uses less digits than its factorization.

961155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 105 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 961155 is about 980.3851284062. The cubic root of 961155 is about 98.6880292698.

Subtracting from 961155 its product of digits (1350), we obtain a triangular number (959805 = T₁₃₈₅).

The spelling of 961155 in words is "nine hundred sixty-one thousand, one hundred fifty-five".