2642405 has 8 divisors (see below), whose sum is σ = 3182112. Its totient is φ = 2106448.

The previous prime is 2642389. The next prime is 2642449. The reversal of 2642405 is 5042462.

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

It is a cyclic number.

It is not a de Polignac number, because 2642405 - 2⁴ = 2642389 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 6⁷ + 4² + 2²¹ + 4⁹ + 0 + 5⁵ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (397764).

2^2642405 is an apocalyptic number.

It is an amenable number.

2642405 is a deficient number, since it is larger than the sum of its proper divisors (539707).

2642405 is a wasteful number, since it uses less digits than its factorization.

2642405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2642405 is about 1625.5476000413. The cubic root of 2642405 is about 138.2504204681.

Adding to 2642405 its reverse (5042462), we get a palindrome (7684867).

The spelling of 2642405 in words is "two million, six hundred forty-two thousand, four hundred five".