1356997 has 8 divisors (see below), whose sum is σ = 1425240. Its totient is φ = 1290240.

The previous prime is 1356973. The next prime is 1357001. The reversal of 1356997 is 7996531.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 829921 = 726^2 + 911^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1356997 - 2⁷ = 1356869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797 + ... + 2437.

It is an arithmetic number, because the mean of its divisors is an integer number (178155).

2^1356997 is an apocalyptic number.

It is an amenable number.

1356997 is a deficient number, since it is larger than the sum of its proper divisors (68243).

1356997 is an equidigital number, since it uses as much as digits as its factorization.

1356997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743.

The product of its digits is 51030, while the sum is 40.

The square root of 1356997 is about 1164.9021418128. The cubic root of 1356997 is about 110.7115580122.

The spelling of 1356997 in words is "one million, three hundred fifty-six thousand, nine hundred ninety-seven".