42621651 has 12 divisors (see below), whose sum is σ = 61807512. Its totient is φ = 28302336.

The previous prime is 42621647. The next prime is 42621653. The reversal of 42621651 is 15612624.

42621651 is a `hidden beast` number, since 4 + 2 + 6 + 2 + 1 + 651 = 666.

42621651 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 42621651 - 2² = 42621647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42621653) 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 11 ways as a sum of consecutive naturals, for example, 6901 + ... + 11526.

It is an arithmetic number, because the mean of its divisors is an integer number (5150626).

Almost surely, 2^42621651 is an apocalyptic number.

42621651 is a deficient number, since it is larger than the sum of its proper divisors (19185861).

42621651 is a wasteful number, since it uses less digits than its factorization.

42621651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18690 (or 18687 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 42621651 is about 6528.5259438866. The cubic root of 42621651 is about 349.3092526287.

The spelling of 42621651 in words is "forty-two million, six hundred twenty-one thousand, six hundred fifty-one".