1355899 has 4 divisors (see below), whose sum is σ = 1381536. Its totient is φ = 1330264.

The previous prime is 1355891. The next prime is 1355917. The reversal of 1355899 is 9985531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9985531 = 2971 ⋅3361.

It is a cyclic number.

It is not a de Polignac number, because 1355899 - 2³ = 1355891 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12739 + ... + 12844.

It is an arithmetic number, because the mean of its divisors is an integer number (345384).

2^1355899 is an apocalyptic number.

1355899 is a deficient number, since it is larger than the sum of its proper divisors (25637).

1355899 is an equidigital number, since it uses as much as digits as its factorization.

1355899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25636.

The product of its digits is 48600, while the sum is 40.

The square root of 1355899 is about 1164.4307622182. The cubic root of 1355899 is about 110.6816895865.

The spelling of 1355899 in words is "one million, three hundred fifty-five thousand, eight hundred ninety-nine".