1191213 has 8 divisors (see below), whose sum is σ = 1764800. Its totient is φ = 794124.

The previous prime is 1191209. The next prime is 1191221. The reversal of 1191213 is 3121911.

It is not a de Polignac number, because 1191213 - 2² = 1191209 is a prime.

It is a super-2 number, since 2×1191213² = 2837976822738, 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 (1191283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22033 + ... + 22086.

It is an arithmetic number, because the mean of its divisors is an integer number (220600).

2^1191213 is an apocalyptic number.

It is an amenable number.

1191213 is a deficient number, since it is larger than the sum of its proper divisors (573587).

1191213 is an equidigital number, since it uses as much as digits as its factorization.

1191213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44128 (or 44122 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

The square root of 1191213 is about 1091.4270474933. The cubic root of 1191213 is about 106.0058439878.

The spelling of 1191213 in words is "one million, one hundred ninety-one thousand, two hundred thirteen".