1072399 has 4 divisors (see below), whose sum is σ = 1095264. Its totient is φ = 1049536.

The previous prime is 1072397. The next prime is 1072429. The reversal of 1072399 is 9932701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932701 = 41 ⋅242261.

It is a cyclic number.

It is not a de Polignac number, because 1072399 - 2¹ = 1072397 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1072399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072397) 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, 11362 + ... + 11455.

It is an arithmetic number, because the mean of its divisors is an integer number (273816).

2^1072399 is an apocalyptic number.

1072399 is a deficient number, since it is larger than the sum of its proper divisors (22865).

1072399 is an equidigital number, since it uses as much as digits as its factorization.

1072399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22864.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1072399 is about 1035.5669944528. The cubic root of 1072399 is about 102.3572949674.

The spelling of 1072399 in words is "one million, seventy-two thousand, three hundred ninety-nine".