42280042 has 12 divisors (see below), whose sum is σ = 73774530. Its totient is φ = 18119976.

The previous prime is 42280039. The next prime is 42280079. The reversal of 42280042 is 24008224.

It can be written as a sum of positive squares in only one way, i.e., 33512521 + 8767521 = 5789^2 + 2961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42279995 and 42280022.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215617 + ... + 215812.

Almost surely, 2^42280042 is an apocalyptic number.

42280042 is a deficient number, since it is larger than the sum of its proper divisors (31494488).

42280042 is a wasteful number, since it uses less digits than its factorization.

42280042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431445 (or 431438 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 42280042 is about 6502.3105124256. The cubic root of 42280042 is about 348.3735199827.

Adding to 42280042 its reverse (24008224), we get a palindrome (66288266).

The spelling of 42280042 in words is "forty-two million, two hundred eighty thousand, forty-two".