1399959 has 24 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 833040.

The previous prime is 1399943. The next prime is 1399963. The reversal of 1399959 is 9599931.

It is not a de Polignac number, because 1399959 - 2⁴ = 1399943 is a prime.

1399959 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399919) 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, 7732 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2^1399959 is an apocalyptic number.

1399959 is a deficient number, since it is larger than the sum of its proper divisors (846441).

1399959 is a wasteful number, since it uses less digits than its factorization.

1399959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 272 counting only the distinct ones).

The product of its digits is 98415, while the sum is 45.

The square root of 1399959 is about 1183.1986308309. The cubic root of 1399959 is about 111.8678021440.

The spelling of 1399959 in words is "one million, three hundred ninety-nine thousand, nine hundred fifty-nine".