42245405 has 16 divisors (see below), whose sum is σ = 52531200. Its totient is φ = 32580480.

The previous prime is 42245383. The next prime is 42245447. The reversal of 42245405 is 50454224.

It is not a de Polignac number, because 42245405 - 2¹⁶ = 42179869 is a prime.

It is a super-2 number, since 2×42245405² = 3569348487228050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73961 + ... + 74529.

It is an arithmetic number, because the mean of its divisors is an integer number (3283200).

Almost surely, 2^42245405 is an apocalyptic number.

It is an amenable number.

42245405 is a deficient number, since it is larger than the sum of its proper divisors (10285795).

42245405 is a wasteful number, since it uses less digits than its factorization.

42245405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 42245405 is about 6499.6465288506. The cubic root of 42245405 is about 348.2783615293.

Adding to 42245405 its reverse (50454224), we get a palindrome (92699629).

The spelling of 42245405 in words is "forty-two million, two hundred forty-five thousand, four hundred five".