1397291 has 8 divisors (see below), whose sum is σ = 1604064. Its totient is φ = 1192320.

The previous prime is 1397287. The next prime is 1397303. The reversal of 1397291 is 1927931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397291 - 2² = 1397287 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1397251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (200508).

2^1397291 is an apocalyptic number.

1397291 is a deficient number, since it is larger than the sum of its proper divisors (206773).

1397291 is an equidigital number, since it uses as much as digits as its factorization.

1397291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901.

The product of its digits is 3402, while the sum is 32.

The square root of 1397291 is about 1182.0706408671. The cubic root of 1397291 is about 111.7966921810.

The spelling of 1397291 in words is "one million, three hundred ninety-seven thousand, two hundred ninety-one".