2445391 has 4 divisors (see below), whose sum is σ = 2633512. Its totient is φ = 2257272.

The previous prime is 2445389. The next prime is 2445409. The reversal of 2445391 is 1935442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1935442 = 2 ⋅967721.

It is a cyclic number.

It is not a de Polignac number, because 2445391 - 2¹ = 2445389 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 (2445301) 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, 94041 + ... + 94066.

It is an arithmetic number, because the mean of its divisors is an integer number (658378).

2^2445391 is an apocalyptic number.

2445391 is a deficient number, since it is larger than the sum of its proper divisors (188121).

2445391 is a wasteful number, since it uses less digits than its factorization.

2445391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188120.

The product of its digits is 4320, while the sum is 28.

The square root of 2445391 is about 1563.7746001262. The cubic root of 2445391 is about 134.7253859808.

The spelling of 2445391 in words is "two million, four hundred forty-five thousand, three hundred ninety-one".