42172777 has 8 divisors (see below), whose sum is σ = 44729280. Its totient is φ = 39676560.

The previous prime is 42172759. The next prime is 42172783. The reversal of 42172777 is 77727124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42172777 - 2¹¹ = 42170729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42172717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13627 + ... + 16432.

It is an arithmetic number, because the mean of its divisors is an integer number (5591160).

Almost surely, 2^42172777 is an apocalyptic number.

It is an amenable number.

42172777 is a deficient number, since it is larger than the sum of its proper divisors (2556503).

42172777 is a wasteful number, since it uses less digits than its factorization.

42172777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30143.

The product of its digits is 38416, while the sum is 37.

The square root of 42172777 is about 6494.0570524134. The cubic root of 42172777 is about 348.0786611499.

The spelling of 42172777 in words is "forty-two million, one hundred seventy-two thousand, seven hundred seventy-seven".