1222291 has 4 divisors (see below), whose sum is σ = 1396912. Its totient is φ = 1047672.

The previous prime is 1222279. The next prime is 1222307. The reversal of 1222291 is 1922221.

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 1222291 - 2⁵ = 1222259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222231) 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, 87300 + ... + 87313.

It is an arithmetic number, because the mean of its divisors is an integer number (349228).

2^1222291 is an apocalyptic number.

1222291 is a deficient number, since it is larger than the sum of its proper divisors (174621).

1222291 is an equidigital number, since it uses as much as digits as its factorization.

1222291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174620.

The product of its digits is 144, while the sum is 19.

The square root of 1222291 is about 1105.5727022679. The cubic root of 1222291 is about 106.9198164812.

The spelling of 1222291 in words is "one million, two hundred twenty-two thousand, two hundred ninety-one".