42165224 has 8 divisors (see below), whose sum is σ = 79059810. Its totient is φ = 21082608.

The previous prime is 42165197. The next prime is 42165229. The reversal of 42165224 is 42256124.

It can be written as a sum of positive squares in only one way, i.e., 25502500 + 16662724 = 5050^2 + 4082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×42165224² = 3555812229940352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42165193 and 42165202.

It is not an unprimeable number, because it can be changed into a prime (42165229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635319 + ... + 2635334.

Almost surely, 2^42165224 is an apocalyptic number.

It is an amenable number.

42165224 is a deficient number, since it is larger than the sum of its proper divisors (36894586).

42165224 is a wasteful number, since it uses less digits than its factorization.

42165224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270659 (or 5270655 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 42165224 is about 6493.4754946793. The cubic root of 42165224 is about 348.0578800103.

The spelling of 42165224 in words is "forty-two million, one hundred sixty-five thousand, two hundred twenty-four".