2391855 has 8 divisors (see below), whose sum is σ = 3826992. Its totient is φ = 1275648.

The previous prime is 2391847. The next prime is 2391859. The reversal of 2391855 is 5581932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2391855 - 2³ = 2391847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79714 + ... + 79743.

It is an arithmetic number, because the mean of its divisors is an integer number (478374).

2^2391855 is an apocalyptic number.

2391855 is a deficient number, since it is larger than the sum of its proper divisors (1435137).

2391855 is a wasteful number, since it uses less digits than its factorization.

2391855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159465.

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

The square root of 2391855 is about 1546.5623168822. The cubic root of 2391855 is about 133.7349591495.

The spelling of 2391855 in words is "two million, three hundred ninety-one thousand, eight hundred fifty-five".