42017128 has 32 divisors (see below), whose sum is σ = 82260360. Its totient is φ = 20101120.

The previous prime is 42017119. The next prime is 42017137. The reversal of 42017128 is 82171024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42017119) and next prime (42017137).

It can be written as a sum of positive squares in 4 ways, for example, as 39463524 + 2553604 = 6282^2 + 1598^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16176 + ... + 18592.

Almost surely, 2^42017128 is an apocalyptic number.

It is an amenable number.

42017128 is a deficient number, since it is larger than the sum of its proper divisors (40243232).

42017128 is a wasteful number, since it uses less digits than its factorization.

42017128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 42017128 is about 6482.0620175990. The cubic root of 42017128 is about 347.6499099592.

The spelling of 42017128 in words is "forty-two million, seventeen thousand, one hundred twenty-eight".