1191225965 has 8 divisors (see below), whose sum is σ = 1430088288. Its totient is φ = 952569360.

The previous prime is 1191225961. The next prime is 1191225977. The reversal of 1191225965 is 5695221911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1191225965 - 2² = 1191225961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191225961) 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 7 ways as a sum of consecutive naturals, for example, 38387 + ... + 62096.

It is an arithmetic number, because the mean of its divisors is an integer number (178761036).

Almost surely, 2^1191225965 is an apocalyptic number.

It is an amenable number.

1191225965 is a deficient number, since it is larger than the sum of its proper divisors (238862323).

1191225965 is a wasteful number, since it uses less digits than its factorization.

1191225965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102859.

The product of its digits is 48600, while the sum is 41.

The square root of 1191225965 is about 34514.1415219907. The cubic root of 1191225965 is about 1060.0622857075.

The spelling of 1191225965 in words is "one billion, one hundred ninety-one million, two hundred twenty-five thousand, nine hundred sixty-five".