1390743 has 16 divisors (see below), whose sum is σ = 2169600. Its totient is φ = 878040.

The previous prime is 1390733. The next prime is 1390757. The reversal of 1390743 is 3470931.

It is not a de Polignac number, because 1390743 - 2¹³ = 1382551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390703) 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 15 ways as a sum of consecutive naturals, for example, 843 + ... + 1868.

It is an arithmetic number, because the mean of its divisors is an integer number (135600).

2^1390743 is an apocalyptic number.

1390743 is a deficient number, since it is larger than the sum of its proper divisors (778857).

1390743 is a wasteful number, since it uses less digits than its factorization.

1390743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1390743 is about 1179.2976723457. The cubic root of 1390743 is about 111.6217843935.

The spelling of 1390743 in words is "one million, three hundred ninety thousand, seven hundred forty-three".