42517534 has 4 divisors (see below), whose sum is σ = 63776304. Its totient is φ = 21258766.

The previous prime is 42517513. The next prime is 42517537. The reversal of 42517534 is 43571524.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 42517496 and 42517505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42517537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10629382 + ... + 10629385.

It is an arithmetic number, because the mean of its divisors is an integer number (15944076).

Almost surely, 2^42517534 is an apocalyptic number.

42517534 is a deficient number, since it is larger than the sum of its proper divisors (21258770).

42517534 is a wasteful number, since it uses less digits than its factorization.

42517534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21258769.

The product of its digits is 16800, while the sum is 31.

The square root of 42517534 is about 6520.5470629388. The cubic root of 42517534 is about 349.0245875568.

The spelling of 42517534 in words is "forty-two million, five hundred seventeen thousand, five hundred thirty-four".