42032621 has 4 divisors (see below), whose sum is σ = 43388544. Its totient is φ = 40676700.

The previous prime is 42032593. The next prime is 42032623. The reversal of 42032621 is 12623024.

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 42032621 - 2¹⁴ = 42016237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42032593 and 42032602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42032623) 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, 677915 + ... + 677976.

It is an arithmetic number, because the mean of its divisors is an integer number (10847136).

Almost surely, 2^42032621 is an apocalyptic number.

It is an amenable number.

42032621 is a deficient number, since it is larger than the sum of its proper divisors (1355923).

42032621 is a wasteful number, since it uses less digits than its factorization.

42032621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355922.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 42032621 is about 6483.2569747003. The cubic root of 42032621 is about 347.6926344261.

Adding to 42032621 its reverse (12623024), we get a palindrome (54655645).

The spelling of 42032621 in words is "forty-two million, thirty-two thousand, six hundred twenty-one".