1397558 has 4 divisors (see below), whose sum is σ = 2096340. Its totient is φ = 698778.

The previous prime is 1397551. The next prime is 1397563. The reversal of 1397558 is 8557931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397551) 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 as a sum of consecutive naturals, namely, 349388 + ... + 349391.

It is an arithmetic number, because the mean of its divisors is an integer number (524085).

2^1397558 is an apocalyptic number.

1397558 is a deficient number, since it is larger than the sum of its proper divisors (698782).

1397558 is an equidigital number, since it uses as much as digits as its factorization.

1397558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698781.

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

The square root of 1397558 is about 1182.1835728854. The cubic root of 1397558 is about 111.8038125818.

The spelling of 1397558 in words is "one million, three hundred ninety-seven thousand, five hundred fifty-eight".