1399555 has 8 divisors (see below), whose sum is σ = 1686672. Its totient is φ = 1114848.

The previous prime is 1399553. The next prime is 1399577. The reversal of 1399555 is 5559931.

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 1399555 - 2¹ = 1399553 is a prime.

It is a Duffinian number.

1399555 is a lucky 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 7 ways as a sum of consecutive naturals, for example, 1144 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (210834).

2^1399555 is an apocalyptic number.

1399555 is a deficient number, since it is larger than the sum of its proper divisors (287117).

1399555 is an equidigital number, since it uses as much as digits as its factorization.

1399555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205.

The product of its digits is 30375, while the sum is 37.

The square root of 1399555 is about 1183.0278948529. The cubic root of 1399555 is about 111.8570401764.

The spelling of 1399555 in words is "one million, three hundred ninety-nine thousand, five hundred fifty-five".