2445405 has 8 divisors (see below), whose sum is σ = 3912672. Its totient is φ = 1304208.

The previous prime is 2445389. The next prime is 2445409. The reversal of 2445405 is 5045442.

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

It is not a de Polignac number, because 2445405 - 2⁴ = 2445389 is a prime.

It is a super-2 number, since 2×2445405² = 11960011228050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2445409) 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, 81499 + ... + 81528.

It is an arithmetic number, because the mean of its divisors is an integer number (489084).

2^2445405 is an apocalyptic number.

It is an amenable number.

2445405 is a deficient number, since it is larger than the sum of its proper divisors (1467267).

2445405 is a wasteful number, since it uses less digits than its factorization.

2445405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163035.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 2445405 is about 1563.7790764683. The cubic root of 2445405 is about 134.7256430838.

It can be divided in two parts, 2445 and 405, that added together give a triangular number (2850 = T₇₅).

The spelling of 2445405 in words is "two million, four hundred forty-five thousand, four hundred five".