1399557 has 16 divisors (see below), whose sum is σ = 1958400. Its totient is φ = 888000.

The previous prime is 1399553. The next prime is 1399577. The reversal of 1399557 is 7559931.

1399557 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 1399557 - 2² = 1399553 is a prime.

1399557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9319 + ... + 9467.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2^1399557 is an apocalyptic number.

It is an amenable number.

1399557 is a deficient number, since it is larger than the sum of its proper divisors (558843).

1399557 is a wasteful number, since it uses less digits than its factorization.

1399557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its digits is 42525, while the sum is 39.

The square root of 1399557 is about 1183.0287401412. The cubic root of 1399557 is about 111.8570934586.

The spelling of 1399557 in words is "one million, three hundred ninety-nine thousand, five hundred fifty-seven".