42117051 has 4 divisors (see below), whose sum is σ = 56156072. Its totient is φ = 28078032.

The previous prime is 42117017. The next prime is 42117059. The reversal of 42117051 is 15071124.

It is a happy number.

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

It is not a de Polignac number, because 42117051 - 2¹⁵ = 42084283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42117059) 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, 7019506 + ... + 7019511.

It is an arithmetic number, because the mean of its divisors is an integer number (14039018).

Almost surely, 2^42117051 is an apocalyptic number.

42117051 is a deficient number, since it is larger than the sum of its proper divisors (14039021).

42117051 is a wasteful number, since it uses less digits than its factorization.

42117051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14039020.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 42117051 is about 6489.7650959029. The cubic root of 42117051 is about 347.9252795713.

Adding to 42117051 its reverse (15071124), we get a palindrome (57188175).

The spelling of 42117051 in words is "forty-two million, one hundred seventeen thousand, fifty-one".