1392399 has 12 divisors (see below), whose sum is σ = 2028312. Its totient is φ = 920400.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392399 is 9932931.

It is a Cunningham number, because it is equal to 1180²-1.

It is not a de Polignac number, because 1392399 - 2⁵ = 1392367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589 + ... + 1769.

It is an arithmetic number, because the mean of its divisors is an integer number (169026).

2^1392399 is an apocalyptic number.

1392399 is a deficient number, since it is larger than the sum of its proper divisors (635913).

1392399 is a wasteful number, since it uses less digits than its factorization.

1392399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1315 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1392399 is about 1179.9995762711. Note that the first 3 decimals coincide. The cubic root of 1392399 is about 111.6660706386. Note that the first 3 decimals are identical.

The spelling of 1392399 in words is "one million, three hundred ninety-two thousand, three hundred ninety-nine".