2405642 has 8 divisors (see below), whose sum is σ = 3658116. Its totient is φ = 1186272.

The previous prime is 2405633. The next prime is 2405651. The reversal of 2405642 is 2465042.

It is an interprime number because it is at equal distance from previous prime (2405633) and next prime (2405651).

It can be written as a sum of positive squares in 2 ways, for example, as 2399401 + 6241 = 1549^2 + 79^2 .

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

It is a super-2 number, since 2×2405642² = 11574226864328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8093 + ... + 8384.

2^2405642 is an apocalyptic number.

2405642 is a deficient number, since it is larger than the sum of its proper divisors (1252474).

2405642 is a wasteful number, since it uses less digits than its factorization.

2405642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16552.

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

The square root of 2405642 is about 1551.0132172229. The cubic root of 2405642 is about 133.9914229306.

The spelling of 2405642 in words is "two million, four hundred five thousand, six hundred forty-two".