42180077 has 4 divisors (see below), whose sum is σ = 44661276. Its totient is φ = 39698880.

The previous prime is 42180053. The next prime is 42180107. The reversal of 42180077 is 77008124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23222761 + 18957316 = 4819^2 + 4354^2 .

It is a cyclic number.

It is not a de Polignac number, because 42180077 - 2⁶ = 42180013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42186077) 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, 1240574 + ... + 1240607.

It is an arithmetic number, because the mean of its divisors is an integer number (11165319).

Almost surely, 2^42180077 is an apocalyptic number.

It is an amenable number.

42180077 is a deficient number, since it is larger than the sum of its proper divisors (2481199).

42180077 is a wasteful number, since it uses less digits than its factorization.

42180077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481198.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 42180077 is about 6494.6190804388. The cubic root of 42180077 is about 348.0987438336.

The spelling of 42180077 in words is "forty-two million, one hundred eighty thousand, seventy-seven".