42215777 has 8 divisors (see below), whose sum is σ = 47052000.
Its totient is φ = 37641024.
The previous prime is 42215759. The next prime is 42215791. The reversal of 42215777 is 77751224.
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 42215777 - 26 = 42215713 is a prime.
It is a super-3 number, since 3×422157773 (a number of 24 digits) contains 333 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (42215177) 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, 65027 + ... + 65672.
It is an arithmetic number, because the mean of its divisors is an integer number (5881500).
Almost surely, 242215777 is an apocalyptic number.
It is an amenable number.
42215777 is a deficient number, since it is larger than the sum of its proper divisors (4836223).
42215777 is a wasteful number, since it uses less digits than its factorization.
42215777 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 130735.
The product of its digits is 27440, while the sum is 35.
The square root of 42215777 is about 6497.3669282256.
The cubic root of 42215777 is about 348.1969230507.
The spelling of 42215777 in words is "forty-two million, two hundred fifteen thousand, seven hundred seventy-seven".