42236649 has 36 divisors (see below), whose sum is σ = 75518976. Its totient is φ = 22273056.

The previous prime is 42236617. The next prime is 42236657. The reversal of 42236649 is 94663224.

42236649 is a `hidden beast` number, since 4 + 2 + 2 + 3 + 6 + 649 = 666.

42236649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42236649 - 2⁵ = 42236617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42236659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8664 + ... + 12630.

Almost surely, 2^42236649 is an apocalyptic number.

It is an amenable number.

42236649 is a deficient number, since it is larger than the sum of its proper divisors (33282327).

42236649 is a wasteful number, since it uses less digits than its factorization.

42236649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006 (or 3990 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 42236649 is about 6498.9729188542. The cubic root of 42236649 is about 348.2542978783.

The spelling of 42236649 in words is "forty-two million, two hundred thirty-six thousand, six hundred forty-nine".