1172291 has 4 divisors (see below), whose sum is σ = 1176000. Its totient is φ = 1168584.

The previous prime is 1172279. The next prime is 1172317. The reversal of 1172291 is 1922711.

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 1172291 - 2¹⁰ = 1171267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172261) 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, 1331 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (294000).

2^1172291 is an apocalyptic number.

1172291 is a deficient number, since it is larger than the sum of its proper divisors (3709).

1172291 is an equidigital number, since it uses as much as digits as its factorization.

1172291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708.

The product of its digits is 252, while the sum is 23.

The square root of 1172291 is about 1082.7238798512. The cubic root of 1172291 is about 105.4415569931.

The spelling of 1172291 in words is "one million, one hundred seventy-two thousand, two hundred ninety-one".