1297018 has 4 divisors (see below), whose sum is σ = 1945530. Its totient is φ = 648508.

The previous prime is 1297013. The next prime is 1297019. The reversal of 1297018 is 8107921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8107921 = 37 ⋅219133.

It can be written as a sum of positive squares in only one way, i.e., 683929 + 613089 = 827^2 + 783^2 .

It is not an unprimeable number, because it can be changed into a prime (1297013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324253 + ... + 324256.

2^1297018 is an apocalyptic number.

1297018 is a deficient number, since it is larger than the sum of its proper divisors (648512).

1297018 is an equidigital number, since it uses as much as digits as its factorization.

1297018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648511.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1297018 is about 1138.8669808191. The cubic root of 1297018 is about 109.0557748389.

The spelling of 1297018 in words is "one million, two hundred ninety-seven thousand, eighteen".