42780277 has 4 divisors (see below), whose sum is σ = 43106976. Its totient is φ = 42453580.

The previous prime is 42780233. The next prime is 42780281. The reversal of 42780277 is 77208724.

42780277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42780277 - 2⁷ = 42780149 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 (42780377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163153 + ... + 163414.

It is an arithmetic number, because the mean of its divisors is an integer number (10776744).

Almost surely, 2^42780277 is an apocalyptic number.

It is an amenable number.

42780277 is a deficient number, since it is larger than the sum of its proper divisors (326699).

42780277 is a wasteful number, since it uses less digits than its factorization.

42780277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326698.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 42780277 is about 6540.6633455637. The cubic root of 42780277 is about 349.7420602929.

The spelling of 42780277 in words is "forty-two million, seven hundred eighty thousand, two hundred seventy-seven".