42532021 has 4 divisors (see below), whose sum is σ = 48608032. Its totient is φ = 36456012.

The previous prime is 42531971. The next prime is 42532027. The reversal of 42532021 is 12023524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42532021 - 2⁹ = 42531509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42532021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42532027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3037995 + ... + 3038008.

It is an arithmetic number, because the mean of its divisors is an integer number (12152008).

Almost surely, 2^42532021 is an apocalyptic number.

It is an amenable number.

42532021 is a deficient number, since it is larger than the sum of its proper divisors (6076011).

42532021 is an equidigital number, since it uses as much as digits as its factorization.

42532021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6076010.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42532021 is about 6521.6578413775. The cubic root of 42532021 is about 349.0642241064.

Adding to 42532021 its reverse (12023524), we get a palindrome (54555545).

The spelling of 42532021 in words is "forty-two million, five hundred thirty-two thousand, twenty-one".