42408645 has 16 divisors (see below), whose sum is σ = 67953600. Its totient is φ = 22584704.

The previous prime is 42408631. The next prime is 42408647. The reversal of 42408645 is 54680424.

It is a cyclic number.

It is not a de Polignac number, because 42408645 - 2⁴ = 42408629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42408647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11206 + ... + 14504.

It is an arithmetic number, because the mean of its divisors is an integer number (4247100).

Almost surely, 2^42408645 is an apocalyptic number.

It is an amenable number.

42408645 is a deficient number, since it is larger than the sum of its proper divisors (25544955).

42408645 is a wasteful number, since it uses less digits than its factorization.

42408645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 42408645 is about 6512.1920272670. The cubic root of 42408645 is about 348.7263778145.

The spelling of 42408645 in words is "forty-two million, four hundred eight thousand, six hundred forty-five".