42021629 has 8 divisors (see below), whose sum is σ = 46021920. Its totient is φ = 38131056.

The previous prime is 42021613. The next prime is 42021641. The reversal of 42021629 is 92612024.

42021629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42021629 - 2⁴ = 42021613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42021598 and 42021607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021689) 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 7 ways as a sum of consecutive naturals, for example, 26627 + ... + 28160.

It is an arithmetic number, because the mean of its divisors is an integer number (5752740).

Almost surely, 2^42021629 is an apocalyptic number.

It is an amenable number.

42021629 is a deficient number, since it is larger than the sum of its proper divisors (4000291).

42021629 is a wasteful number, since it uses less digits than its factorization.

42021629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54859.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42021629 is about 6482.4091972044. The cubic root of 42021629 is about 347.6623232809.

The spelling of 42021629 in words is "forty-two million, twenty-one thousand, six hundred twenty-nine".