42336621 has 16 divisors (see below), whose sum is σ = 64417600. Its totient is φ = 27460944.

The previous prime is 42336601. The next prime is 42336643. The reversal of 42336621 is 12663324.

42336621 is a `hidden beast` number, since 4 + 2 + 3 + 36 + 621 = 666.

It is not a de Polignac number, because 42336621 - 2⁵ = 42336589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42336601) 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, 20191 + ... + 22188.

It is an arithmetic number, because the mean of its divisors is an integer number (4026100).

Almost surely, 2^42336621 is an apocalyptic number.

It is an amenable number.

42336621 is a deficient number, since it is larger than the sum of its proper divisors (22080979).

42336621 is a wasteful number, since it uses less digits than its factorization.

42336621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42425 (or 42419 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 42336621 is about 6506.6597421411. The cubic root of 42336621 is about 348.5288481135.

Adding to 42336621 its reverse (12663324), we get a palindrome (54999945).

The spelling of 42336621 in words is "forty-two million, three hundred thirty-six thousand, six hundred twenty-one".