1397575 has 6 divisors (see below), whose sum is σ = 1733024. Its totient is φ = 1118040.

The previous prime is 1397569. The next prime is 1397579. The reversal of 1397575 is 5757931.

It is a happy number.

It is not a de Polignac number, because 1397575 - 2⁷ = 1397447 is a prime.

It is a Duffinian number.

1397575 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397579) 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 5 ways as a sum of consecutive naturals, for example, 27927 + ... + 27976.

2^1397575 is an apocalyptic number.

1397575 is a deficient number, since it is larger than the sum of its proper divisors (335449).

1397575 is an equidigital number, since it uses as much as digits as its factorization.

1397575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55913 (or 55908 counting only the distinct ones).

The product of its digits is 33075, while the sum is 37.

The square root of 1397575 is about 1182.1907629482. The cubic root of 1397575 is about 111.8042659099.

The spelling of 1397575 in words is "one million, three hundred ninety-seven thousand, five hundred seventy-five".