1136891 has 4 divisors (see below), whose sum is σ = 1299312. Its totient is φ = 974472.

The previous prime is 1136869. The next prime is 1136897. The reversal of 1136891 is 1986311.

1136891 = 400² + 401² + ... + 406².

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1136891 - 2¹⁴ = 1120507 is a prime.

It is a super-2 number, since 2×1136891² = 2585042291762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1136897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81200 + ... + 81213.

It is an arithmetic number, because the mean of its divisors is an integer number (324828).

2^1136891 is an apocalyptic number.

1136891 is a deficient number, since it is larger than the sum of its proper divisors (162421).

1136891 is an equidigital number, since it uses as much as digits as its factorization.

1136891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162420.

The product of its digits is 1296, while the sum is 29.

The square root of 1136891 is about 1066.2509085576. The cubic root of 1136891 is about 104.3693413692.

The spelling of 1136891 in words is "one million, one hundred thirty-six thousand, eight hundred ninety-one".