961191 has 48 divisors (see below), whose sum is σ = 1847040. Its totient is φ = 466560.

The previous prime is 961189. The next prime is 961201. The reversal of 961191 is 191169.

961191 is a nontrivial binomial coefficient, being equal to C(1387, 2).

It is not a de Polignac number, because 961191 - 2¹ = 961189 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961141) 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, 13131 + ... + 13203.

It is an arithmetic number, because the mean of its divisors is an integer number (38480).

2⁹⁶¹¹⁹¹ is an apocalyptic number.

961191 is the 1386-th triangular number.

961191 is a deficient number, since it is larger than the sum of its proper divisors (885849).

961191 is a wasteful number, since it uses less digits than its factorization.

961191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 113 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 961191 is about 980.4034883659. The cubic root of 961191 is about 98.6892613724.

The spelling of 961191 in words is "nine hundred sixty-one thousand, one hundred ninety-one".