1397618 has 12 divisors (see below), whose sum is σ = 2193198. Its totient is φ = 667920.

The previous prime is 1397609. The next prime is 1397633. The reversal of 1397618 is 8167931.

It can be written as a sum of positive squares in only one way, i.e., 889249 + 508369 = 943^2 + 713^2 .

It is a Curzon number.

It is an unprimeable number.

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, 398 + ... + 1718.

2^1397618 is an apocalyptic number.

1397618 is a deficient number, since it is larger than the sum of its proper divisors (795580).

1397618 is a wasteful number, since it uses less digits than its factorization.

1397618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369 (or 1346 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 1397618 is about 1182.2089493825. The cubic root of 1397618 is about 111.8054125471.

The spelling of 1397618 in words is "one million, three hundred ninety-seven thousand, six hundred eighteen".