1398459 has 4 divisors (see below), whose sum is σ = 1864616. Its totient is φ = 932304.

The previous prime is 1398451. The next prime is 1398473. The reversal of 1398459 is 9548931.

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

It is not a de Polignac number, because 1398459 - 2³ = 1398451 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

1398459 is a lucky number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1398451) by changing a digit.

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, 233074 + ... + 233079.

It is an arithmetic number, because the mean of its divisors is an integer number (466154).

2^1398459 is an apocalyptic number.

1398459 is a deficient number, since it is larger than the sum of its proper divisors (466157).

1398459 is an equidigital number, since it uses as much as digits as its factorization.

1398459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466156.

The product of its digits is 38880, while the sum is 39.

The square root of 1398459 is about 1182.5645859741. The cubic root of 1398459 is about 111.8278339092.

The spelling of 1398459 in words is "one million, three hundred ninety-eight thousand, four hundred fifty-nine".