961231 has 4 divisors (see below), whose sum is σ = 1017792. Its totient is φ = 904672.

The previous prime is 961201. The next prime is 961241. The reversal of 961231 is 132169.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 961231 - 2¹¹ = 959183 is a prime.

It is a super-2 number, since 2×961231² = 1847930070722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28255 + ... + 28288.

It is an arithmetic number, because the mean of its divisors is an integer number (254448).

2⁹⁶¹²³¹ is an apocalyptic number.

961231 is a deficient number, since it is larger than the sum of its proper divisors (56561).

961231 is a wasteful number, since it uses less digits than its factorization.

961231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56560.

The product of its digits is 324, while the sum is 22.

The square root of 961231 is about 980.4238879179. The cubic root of 961231 is about 98.6906303392.

The spelling of 961231 in words is "nine hundred sixty-one thousand, two hundred thirty-one".