1397537 has 6 divisors (see below), whose sum is σ = 1421814. Its totient is φ = 1373600.

The previous prime is 1397531. The next prime is 1397551. The reversal of 1397537 is 7357931.

It can be written as a sum of positive squares in 3 ways, for example, as 1018081 + 379456 = 1009^2 + 616^2 .

It is not a de Polignac number, because 1397537 - 2⁴ = 1397521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1397497 and 1397506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10133 + ... + 10269.

It is an arithmetic number, because the mean of its divisors is an integer number (236969).

2^1397537 is an apocalyptic number.

It is an amenable number.

1397537 is a deficient number, since it is larger than the sum of its proper divisors (24277).

1397537 is an equidigital number, since it uses as much as digits as its factorization.

1397537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 238 counting only the distinct ones).

The product of its digits is 19845, while the sum is 35.

The square root of 1397537 is about 1182.1746909827. The cubic root of 1397537 is about 111.8032525831.

The spelling of 1397537 in words is "one million, three hundred ninety-seven thousand, five hundred thirty-seven".