2507891 has 8 divisors (see below), whose sum is σ = 2747520. Its totient is φ = 2278528.

The previous prime is 2507881. The next prime is 2507899. The reversal of 2507891 is 1987052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2507891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2507899) 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, 2051 + ... + 3036.

It is an arithmetic number, because the mean of its divisors is an integer number (343440).

2^2507891 is an apocalyptic number.

2507891 is a deficient number, since it is larger than the sum of its proper divisors (239629).

2507891 is a wasteful number, since it uses less digits than its factorization.

2507891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2507891 is about 1583.6322174040. The cubic root of 2507891 is about 135.8635273145.

The spelling of 2507891 in words is "two million, five hundred seven thousand, eight hundred ninety-one".