2865791 has 4 divisors (see below), whose sum is σ = 2908632. Its totient is φ = 2822952.

The previous prime is 2865787. The next prime is 2865803. The reversal of 2865791 is 1975682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2865791 - 2² = 2865787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21320 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (727158).

2^2865791 is an apocalyptic number.

2865791 is a deficient number, since it is larger than the sum of its proper divisors (42841).

2865791 is an equidigital number, since it uses as much as digits as its factorization.

2865791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42840.

The product of its digits is 30240, while the sum is 38.

The square root of 2865791 is about 1692.8647317491. The cubic root of 2865791 is about 142.0413653211.

The spelling of 2865791 in words is "two million, eight hundred sixty-five thousand, seven hundred ninety-one".