1398861 has 12 divisors (see below), whose sum is σ = 2064192. Its totient is φ = 912456.

The previous prime is 1398847. The next prime is 1398863. The reversal of 1398861 is 1688931.

It is not a de Polignac number, because 1398861 - 2⁹ = 1398349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231 + ... + 2076.

It is an arithmetic number, because the mean of its divisors is an integer number (172016).

2^1398861 is an apocalyptic number.

It is an amenable number.

1398861 is a deficient number, since it is larger than the sum of its proper divisors (665331).

1398861 is a wasteful number, since it uses less digits than its factorization.

1398861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 3357 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1398861 is about 1182.7345433359. The cubic root of 1398861 is about 111.8385481984.

The spelling of 1398861 in words is "one million, three hundred ninety-eight thousand, eight hundred sixty-one".