1392879 has 8 divisors (see below), whose sum is σ = 1871280. Its totient is φ = 921536.

The previous prime is 1392877. The next prime is 1392883. The reversal of 1392879 is 9782931.

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 1392879 - 2¹ = 1392877 is a prime.

It is a super-2 number, since 2×1392879² = 3880223817282, which contains 22 as substring.

1392879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (233910).

2^1392879 is an apocalyptic number.

1392879 is a deficient number, since it is larger than the sum of its proper divisors (478401).

1392879 is a wasteful number, since it uses less digits than its factorization.

1392879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529.

The product of its digits is 27216, while the sum is 39.

The square root of 1392879 is about 1180.2029486491. The cubic root of 1392879 is about 111.6789006670.

The spelling of 1392879 in words is "one million, three hundred ninety-two thousand, eight hundred seventy-nine".