1568397 has 8 divisors (see below), whose sum is σ = 2126880. Its totient is φ = 1027760.

The previous prime is 1568389. The next prime is 1568419. The reversal of 1568397 is 7938651.

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 1568397 - 2³ = 1568389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1568377) 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, 4254 + ... + 4607.

It is an arithmetic number, because the mean of its divisors is an integer number (265860).

2^1568397 is an apocalyptic number.

It is an amenable number.

1568397 is a deficient number, since it is larger than the sum of its proper divisors (558483).

1568397 is an equidigital number, since it uses as much as digits as its factorization.

1568397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923.

The product of its digits is 45360, while the sum is 39.

The square root of 1568397 is about 1252.3565786149. The cubic root of 1568397 is about 116.1855186395.

It can be divided in two parts, 15683 and 97, that multiplied together give a palindrome (1521251).

The spelling of 1568397 in words is "one million, five hundred sixty-eight thousand, three hundred ninety-seven".