1392999 has 8 divisors (see below), whose sum is σ = 1892592. Its totient is φ = 911040.

The previous prime is 1392983. The next prime is 1393003. The reversal of 1392999 is 9992931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1392999 - 2⁴ = 1392983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1392999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392959) 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, 4222 + ... + 4539.

It is an arithmetic number, because the mean of its divisors is an integer number (236574).

2^1392999 is an apocalyptic number.

1392999 is a deficient number, since it is larger than the sum of its proper divisors (499593).

1392999 is an equidigital number, since it uses as much as digits as its factorization.

1392999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8817.

The product of its digits is 39366, while the sum is 42.

The square root of 1392999 is about 1180.2537862680. The cubic root of 1392999 is about 111.6821077135.

It can be divided in two parts, 13929 and 99, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1392999 in words is "one million, three hundred ninety-two thousand, nine hundred ninety-nine".