1390705 has 8 divisors (see below), whose sum is σ = 1756800. Its totient is φ = 1053936.

The previous prime is 1390703. The next prime is 1390709. The reversal of 1390705 is 5070931.

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 1390705 - 2¹ = 1390703 is a prime.

It is a super-3 number, since 3×1390705³ = 8069122393333957875, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1390705.

It is not an unprimeable number, because it can be changed into a prime (1390703) 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, 7225 + ... + 7414.

It is an arithmetic number, because the mean of its divisors is an integer number (219600).

2^1390705 is an apocalyptic number.

It is an amenable number.

1390705 is a deficient number, since it is larger than the sum of its proper divisors (366095).

1390705 is a wasteful number, since it uses less digits than its factorization.

1390705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14663.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 1390705 is about 1179.2815609514. The cubic root of 1390705 is about 111.6207677507.

The spelling of 1390705 in words is "one million, three hundred ninety thousand, seven hundred five".