2153859 has 16 divisors (see below), whose sum is σ = 3129600. Its totient is φ = 1312416.

The previous prime is 2153839. The next prime is 2153861. The reversal of 2153859 is 9583512.

It is a de Polignac number, because none of the positive numbers 2^k-2153859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2153819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002 + ... + 2304.

It is an arithmetic number, because the mean of its divisors is an integer number (195600).

2^2153859 is an apocalyptic number.

2153859 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2153859 is a deficient number, since it is larger than the sum of its proper divisors (975741).

2153859 is a wasteful number, since it uses less digits than its factorization.

2153859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354.

The product of its digits is 10800, while the sum is 33.

The square root of 2153859 is about 1467.6031479934. The cubic root of 2153859 is about 129.1434615731.

The spelling of 2153859 in words is "two million, one hundred fifty-three thousand, eight hundred fifty-nine".