1618859 has 12 divisors (see below), whose sum is σ = 1886472. Its totient is φ = 1383360.

The previous prime is 1618853. The next prime is 1618891. The reversal of 1618859 is 9588161.

It is a de Polignac number, because none of the positive numbers 2^k-1618859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618853) 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, 1664 + ... + 2450.

It is an arithmetic number, because the mean of its divisors is an integer number (157206).

2^1618859 is an apocalyptic number.

1618859 is a deficient number, since it is larger than the sum of its proper divisors (267613).

1618859 is a wasteful number, since it uses less digits than its factorization.

1618859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 815 counting only the distinct ones).

The product of its digits is 17280, while the sum is 38.

The square root of 1618859 is about 1272.3439000522. The cubic root of 1618859 is about 117.4184495246.

The spelling of 1618859 in words is "one million, six hundred eighteen thousand, eight hundred fifty-nine".