42884517 has 32 divisors (see below), whose sum is σ = 64044288. Its totient is φ = 25353216.

The previous prime is 42884509. The next prime is 42884519. The reversal of 42884517 is 71548824.

It is a happy number.

It is not a de Polignac number, because 42884517 - 2³ = 42884509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42884519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162928 + ... + 163190.

It is an arithmetic number, because the mean of its divisors is an integer number (2001384).

Almost surely, 2^42884517 is an apocalyptic number.

It is an amenable number.

42884517 is a deficient number, since it is larger than the sum of its proper divisors (21159771).

42884517 is a wasteful number, since it uses less digits than its factorization.

42884517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its digits is 71680, while the sum is 39.

The square root of 42884517 is about 6548.6271080281. The cubic root of 42884517 is about 350.0258946828.

The spelling of 42884517 in words is "forty-two million, eight hundred eighty-four thousand, five hundred seventeen".