1390055 has 8 divisors (see below), whose sum is σ = 1678752. Its totient is φ = 1104928.

The previous prime is 1390043. The next prime is 1390069. The reversal of 1390055 is 5500931.

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 1390055 - 2⁶ = 1389991 is a prime.

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 1390055.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (209844).

2^1390055 is an apocalyptic number.

1390055 is a deficient number, since it is larger than the sum of its proper divisors (288697).

1390055 is a wasteful number, since it uses less digits than its factorization.

1390055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 1390055 is about 1179.0059372200. The cubic root of 1390055 is about 111.6033749402.

Adding to 1390055 its reverse (5500931), we get a palindrome (6890986).

The spelling of 1390055 in words is "one million, three hundred ninety thousand, fifty-five".