1236091 has 4 divisors (see below), whose sum is σ = 1245952. Its totient is φ = 1226232.

The previous prime is 1236077. The next prime is 1236161. The reversal of 1236091 is 1906321.

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 1236091 - 2¹⁷ = 1105019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236491) 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, 4740 + ... + 4993.

It is an arithmetic number, because the mean of its divisors is an integer number (311488).

2^1236091 is an apocalyptic number.

1236091 is a deficient number, since it is larger than the sum of its proper divisors (9861).

1236091 is an equidigital number, since it uses as much as digits as its factorization.

1236091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9860.

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

The square root of 1236091 is about 1111.7962942914. The cubic root of 1236091 is about 107.3206962305.

The spelling of 1236091 in words is "one million, two hundred thirty-six thousand, ninety-one".