1398755 has 4 divisors (see below), whose sum is σ = 1678512. Its totient is φ = 1119000.

The previous prime is 1398737. The next prime is 1398763. The reversal of 1398755 is 5578931.

1398755 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1398755 - 2¹⁶ = 1333219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139871 + ... + 139880.

It is an arithmetic number, because the mean of its divisors is an integer number (419628).

2^1398755 is an apocalyptic number.

1398755 is a deficient number, since it is larger than the sum of its proper divisors (279757).

1398755 is an equidigital number, since it uses as much as digits as its factorization.

1398755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279756.

The product of its digits is 37800, while the sum is 38.

The square root of 1398755 is about 1182.6897310791. The cubic root of 1398755 is about 111.8357232369.

The spelling of 1398755 in words is "one million, three hundred ninety-eight thousand, seven hundred fifty-five".