1390671 has 12 divisors (see below), whose sum is σ = 2021760. Its totient is φ = 921120.

The previous prime is 1390643. The next prime is 1390681. The reversal of 1390671 is 1760931.

It is not a de Polignac number, because 1390671 - 2⁵ = 1390639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390601) 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 11 ways as a sum of consecutive naturals, for example, 1315 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^1390671 is an apocalyptic number.

1390671 is a deficient number, since it is larger than the sum of its proper divisors (631089).

1390671 is a wasteful number, since it uses less digits than its factorization.

1390671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 1390671 is about 1179.2671453068. The cubic root of 1390671 is about 111.6198581073.

The spelling of 1390671 in words is "one million, three hundred ninety thousand, six hundred seventy-one".