42401665 has 8 divisors (see below), whose sum is σ = 51030720. Its totient is φ = 33822192.

The previous prime is 42401657. The next prime is 42401717. The reversal of 42401665 is 56610424.

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 42401665 - 2³ = 42401657 is a prime.

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, 10485 + ... + 13954.

It is an arithmetic number, because the mean of its divisors is an integer number (6378840).

Almost surely, 2^42401665 is an apocalyptic number.

It is an amenable number.

42401665 is a deficient number, since it is larger than the sum of its proper divisors (8629055).

42401665 is a wasteful number, since it uses less digits than its factorization.

42401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24791.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42401665 is about 6511.6560873560. The cubic root of 42401665 is about 348.7072445798.

The spelling of 42401665 in words is "forty-two million, four hundred one thousand, six hundred sixty-five".