42283521 has 18 divisors (see below), whose sum is σ = 71048562. Its totient is φ = 24161760.

The previous prime is 42283519. The next prime is 42283529. The reversal of 42283521 is 12538224.

It can be written as a sum of positive squares in only one way, i.e., 42107121 + 176400 = 6489^2 + 420^2 .

It is not a de Polignac number, because 42283521 - 2¹ = 42283519 is a prime.

It is a super-2 number, since 2×42283521² = 3575792296314882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42283529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 47500 + ... + 48381.

Almost surely, 2^42283521 is an apocalyptic number.

It is an amenable number.

42283521 is a deficient number, since it is larger than the sum of its proper divisors (28765041).

42283521 is a wasteful number, since it uses less digits than its factorization.

42283521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95901 (or 95891 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 42283521 is about 6502.5780272135. The cubic root of 42283521 is about 348.3830749892.

The spelling of 42283521 in words is "forty-two million, two hundred eighty-three thousand, five hundred twenty-one".