42021529 has 24 divisors (see below), whose sum is σ = 49871808. Its totient is φ = 35022240.

The previous prime is 42021517. The next prime is 42021547. The reversal of 42021529 is 92512024.

It is not a de Polignac number, because 42021529 - 2⁷ = 42021401 is a prime.

It is a pancake number, because a pancake can be divided into 42021529 parts by 9167 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627154 + ... + 627220.

It is an arithmetic number, because the mean of its divisors is an integer number (2077992).

Almost surely, 2^42021529 is an apocalyptic number.

It is an amenable number.

42021529 is a deficient number, since it is larger than the sum of its proper divisors (7850279).

42021529 is a wasteful number, since it uses less digits than its factorization.

42021529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 42021529 is about 6482.4014840181. The cubic root of 42021529 is about 347.6620475002.

The spelling of 42021529 in words is "forty-two million, twenty-one thousand, five hundred twenty-nine".