2405391 has 8 divisors (see below), whose sum is σ = 3227520. Its totient is φ = 1593432.

The previous prime is 2405387. The next prime is 2405393. The reversal of 2405391 is 1935042.

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

It is not a de Polignac number, because 2405391 - 2² = 2405387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405393) 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, 1971 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (403440).

2^2405391 is an apocalyptic number.

2405391 is a deficient number, since it is larger than the sum of its proper divisors (822129).

2405391 is a wasteful number, since it uses less digits than its factorization.

2405391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2405391 is about 1550.9323002633. The cubic root of 2405391 is about 133.9867626339.

The spelling of 2405391 in words is "two million, four hundred five thousand, three hundred ninety-one".