42424281 has 12 divisors (see below), whose sum is σ = 61349652. Its totient is φ = 28250496.

The previous prime is 42424279. The next prime is 42424289. The reversal of 42424281 is 18242424.

It can be written as a sum of positive squares in 2 ways, for example, as 17264025 + 25160256 = 4155^2 + 5016^2 .

It is not a de Polignac number, because 42424281 - 2¹ = 42424279 is a prime.

It is a super-2 number, since 2×42424281² = 3599639236733922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42424289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7725 + ... + 12021.

It is an arithmetic number, because the mean of its divisors is an integer number (5112471).

Almost surely, 2^42424281 is an apocalyptic number.

It is an amenable number.

42424281 is a deficient number, since it is larger than the sum of its proper divisors (18925371).

42424281 is a wasteful number, since it uses less digits than its factorization.

42424281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 5397 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 42424281 is about 6513.3924340546. The cubic root of 42424281 is about 348.7692308353.

The spelling of 42424281 in words is "forty-two million, four hundred twenty-four thousand, two hundred eighty-one".