1056399 has 4 divisors (see below), whose sum is σ = 1408536. Its totient is φ = 704264.

The previous prime is 1056379. The next prime is 1056401. The reversal of 1056399 is 9936501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9936501 = 3 ⋅3312167.

It is a cyclic number.

It is not a de Polignac number, because 1056399 - 2⁷ = 1056271 is a prime.

It is a super-2 number, since 2×1056399² = 2231957694402, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056379) 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, 176064 + ... + 176069.

It is an arithmetic number, because the mean of its divisors is an integer number (352134).

2^1056399 is an apocalyptic number.

1056399 is a deficient number, since it is larger than the sum of its proper divisors (352137).

1056399 is an equidigital number, since it uses as much as digits as its factorization.

1056399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352136.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 1056399 is about 1027.8127261325. The cubic root of 1056399 is about 101.8456913193.

The spelling of 1056399 in words is "one million, fifty-six thousand, three hundred ninety-nine".