1390401 has 24 divisors (see below), whose sum is σ = 2171520. Its totient is φ = 854496.

The previous prime is 1390399. The next prime is 1390409. The reversal of 1390401 is 1040931.

It is not a de Polignac number, because 1390401 - 2¹ = 1390399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7951 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (90480).

2^1390401 is an apocalyptic number.

It is an amenable number.

1390401 is a deficient number, since it is larger than the sum of its proper divisors (781119).

1390401 is a wasteful number, since it uses less digits than its factorization.

1390401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1390401 is about 1179.1526618721. The cubic root of 1390401 is about 111.6126339418.

The spelling of 1390401 in words is "one million, three hundred ninety thousand, four hundred one".