1390171 has 4 divisors (see below), whose sum is σ = 1394272. Its totient is φ = 1386072.

The previous prime is 1390159. The next prime is 1390177. The reversal of 1390171 is 1710931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1390171 - 2⁷ = 1390043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (348568).

2^1390171 is an apocalyptic number.

1390171 is the 746-th heptagonal number.

1390171 is a deficient number, since it is larger than the sum of its proper divisors (4101).

1390171 is an equidigital number, since it uses as much as digits as its factorization.

1390171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1390171 is about 1179.0551301784. The cubic root of 1390171 is about 111.6064792853.

The spelling of 1390171 in words is "one million, three hundred ninety thousand, one hundred seventy-one".