42516691 has 4 divisors (see below), whose sum is σ = 48590512. Its totient is φ = 36442872.

The previous prime is 42516671. The next prime is 42516701. The reversal of 42516691 is 19661524.

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

It is a cyclic number.

It is not a de Polignac number, because 42516691 - 2⁷ = 42516563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42516611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036900 + ... + 3036913.

It is an arithmetic number, because the mean of its divisors is an integer number (12147628).

Almost surely, 2^42516691 is an apocalyptic number.

42516691 is a deficient number, since it is larger than the sum of its proper divisors (6073821).

42516691 is an equidigital number, since it uses as much as digits as its factorization.

42516691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073820.

The product of its digits is 12960, while the sum is 34.

The square root of 42516691 is about 6520.4824208029. The cubic root of 42516691 is about 349.0222808248.

The spelling of 42516691 in words is "forty-two million, five hundred sixteen thousand, six hundred ninety-one".