2945865 has 16 divisors (see below), whose sum is σ = 5076288. Its totient is φ = 1450176.

The previous prime is 2945857. The next prime is 2945869. The reversal of 2945865 is 5685492.

It is not a de Polignac number, because 2945865 - 2³ = 2945857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2945869) 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, 7359 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (317268).

2^2945865 is an apocalyptic number.

It is an amenable number.

2945865 is a deficient number, since it is larger than the sum of its proper divisors (2130423).

2945865 is a wasteful number, since it uses less digits than its factorization.

2945865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128.

The product of its digits is 86400, while the sum is 39.

The square root of 2945865 is about 1716.3522365762. The cubic root of 2945865 is about 143.3521728737.

The spelling of 2945865 in words is "two million, nine hundred forty-five thousand, eight hundred sixty-five".