42035021 has 16 divisors (see below), whose sum is σ = 48931584. Its totient is φ = 35368704.

The previous prime is 42035017. The next prime is 42035029. The reversal of 42035021 is 12053024.

It is not a de Polignac number, because 42035021 - 2² = 42035017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42035029) 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, 124565 + ... + 124901.

It is an arithmetic number, because the mean of its divisors is an integer number (3058224).

Almost surely, 2^42035021 is an apocalyptic number.

It is an amenable number.

42035021 is a deficient number, since it is larger than the sum of its proper divisors (6896563).

42035021 is a wasteful number, since it uses less digits than its factorization.

42035021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42035021 is about 6483.4420642125. The cubic root of 42035021 is about 347.6992518772.

Adding to 42035021 its reverse (12053024), we get a palindrome (54088045).

The spelling of 42035021 in words is "forty-two million, thirty-five thousand, twenty-one".