1397081 has 4 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 1197492.

The previous prime is 1397069. The next prime is 1397087. The reversal of 1397081 is 1807931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1397081 is a prime.

It is a super-2 number, since 2×1397081² = 3903670641122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1397087) 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, 99785 + ... + 99798.

It is an arithmetic number, because the mean of its divisors is an integer number (399168).

2^1397081 is an apocalyptic number.

It is an amenable number.

1397081 is a deficient number, since it is larger than the sum of its proper divisors (199591).

1397081 is an equidigital number, since it uses as much as digits as its factorization.

1397081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199590.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1397081 is about 1181.9818103507. The cubic root of 1397081 is about 111.7910912285.

The spelling of 1397081 in words is "one million, three hundred ninety-seven thousand, eighty-one".