1396257 has 4 divisors (see below), whose sum is σ = 1861680. Its totient is φ = 930836.

The previous prime is 1396247. The next prime is 1396259. The reversal of 1396257 is 7526931.

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 not a de Polignac number, because 1396257 - 2⁸ = 1396001 is a prime.

It is a super-2 number, since 2×1396257² = 3899067220098, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1396259) 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, 232707 + ... + 232712.

It is an arithmetic number, because the mean of its divisors is an integer number (465420).

2^1396257 is an apocalyptic number.

It is an amenable number.

1396257 is a deficient number, since it is larger than the sum of its proper divisors (465423).

1396257 is an equidigital number, since it uses as much as digits as its factorization.

1396257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465422.

The product of its digits is 11340, while the sum is 33.

The square root of 1396257 is about 1181.6331918155. The cubic root of 1396257 is about 111.7691087343.

It can be divided in two parts, 1396 and 257, that added together give a triangular number (1653 = T₅₇).

The spelling of 1396257 in words is "one million, three hundred ninety-six thousand, two hundred fifty-seven".