2600391 has 8 divisors (see below), whose sum is σ = 3489904. Its totient is φ = 1722240.

The previous prime is 2600387. The next prime is 2600393. The reversal of 2600391 is 1930062.

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

It is not a de Polignac number, because 2600391 - 2² = 2600387 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 (2600393) 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, 2290 + ... + 3231.

It is an arithmetic number, because the mean of its divisors is an integer number (436238).

2^2600391 is an apocalyptic number.

2600391 is a deficient number, since it is larger than the sum of its proper divisors (889513).

2600391 is a wasteful number, since it uses less digits than its factorization.

2600391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2600391 is about 1612.5727890548. The cubic root of 2600391 is about 137.5137793353.

The spelling of 2600391 in words is "two million, six hundred thousand, three hundred ninety-one".