1297291 has 4 divisors (see below), whose sum is σ = 1305712. Its totient is φ = 1288872.

The previous prime is 1297279. The next prime is 1297297. The reversal of 1297291 is 1927921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1927921 = 31 ⋅62191.

It is a cyclic number.

It is not a de Polignac number, because 1297291 - 2¹¹ = 1295243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297297) 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, 3975 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (326428).

2^1297291 is an apocalyptic number.

1297291 is a deficient number, since it is larger than the sum of its proper divisors (8421).

1297291 is an equidigital number, since it uses as much as digits as its factorization.

1297291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8420.

The product of its digits is 2268, while the sum is 31.

The square root of 1297291 is about 1138.9868304770. The cubic root of 1297291 is about 109.0634257577.

The spelling of 1297291 in words is "one million, two hundred ninety-seven thousand, two hundred ninety-one".