1397543 has 8 divisors (see below), whose sum is σ = 1634688. Its totient is φ = 1169784.

The previous prime is 1397531. The next prime is 1397551. The reversal of 1397543 is 3457931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1397543 - 2⁸ = 1397287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397563) 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 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (204336).

2^1397543 is an apocalyptic number.

1397543 is a deficient number, since it is larger than the sum of its proper divisors (237145).

1397543 is an equidigital number, since it uses as much as digits as its factorization.

1397543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693.

The product of its digits is 11340, while the sum is 32.

The square root of 1397543 is about 1182.1772286760. The cubic root of 1397543 is about 111.8034125833.

The spelling of 1397543 in words is "one million, three hundred ninety-seven thousand, five hundred forty-three".