1375997 has 16 divisors (see below), whose sum is σ = 1723392. Its totient is φ = 1071360.

The previous prime is 1375987. The next prime is 1376003. The reversal of 1375997 is 7995731.

It is not a de Polignac number, because 1375997 - 2⁴ = 1375981 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3503 + ... + 3875.

It is an arithmetic number, because the mean of its divisors is an integer number (107712).

2^1375997 is an apocalyptic number.

1375997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1375997 is a deficient number, since it is larger than the sum of its proper divisors (347395).

1375997 is a wasteful number, since it uses less digits than its factorization.

1375997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 59535, while the sum is 41.

The square root of 1375997 is about 1173.0289851491. The cubic root of 1375997 is about 111.2258744975.

The spelling of 1375997 in words is "one million, three hundred seventy-five thousand, nine hundred ninety-seven".