42277621 has 4 divisors (see below), whose sum is σ = 43735500. Its totient is φ = 40819744.

The previous prime is 42277619. The next prime is 42277633. The reversal of 42277621 is 12677224.

42277621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 34928100 = 2711^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 42277621 - 2¹ = 42277619 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 (42277681) 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 3 ways as a sum of consecutive naturals, for example, 728896 + ... + 728953.

It is an arithmetic number, because the mean of its divisors is an integer number (10933875).

Almost surely, 2^42277621 is an apocalyptic number.

It is an amenable number.

42277621 is a deficient number, since it is larger than the sum of its proper divisors (1457879).

42277621 is a wasteful number, since it uses less digits than its factorization.

42277621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457878.

The product of its digits is 9408, while the sum is 31.

The square root of 42277621 is about 6502.1243451660. The cubic root of 42277621 is about 348.3668704435.

The spelling of 42277621 in words is "forty-two million, two hundred seventy-seven thousand, six hundred twenty-one".