427291243 has 4 divisors (see below), whose sum is σ = 452426040. Its totient is φ = 402156448.

The previous prime is 427291237. The next prime is 427291253. The reversal of 427291243 is 342192724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427291243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427291199 and 427291208.

It is not an unprimeable number, because it can be changed into a prime (427291223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12567373 + ... + 12567406.

It is an arithmetic number, because the mean of its divisors is an integer number (113106510).

Almost surely, 2^427291243 is an apocalyptic number.

427291243 is a deficient number, since it is larger than the sum of its proper divisors (25134797).

427291243 is a wasteful number, since it uses less digits than its factorization.

427291243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25134796.

The product of its digits is 24192, while the sum is 34.

The square root of 427291243 is about 20671.0242368394. The cubic root of 427291243 is about 753.1959870256.

The spelling of 427291243 in words is "four hundred twenty-seven million, two hundred ninety-one thousand, two hundred forty-three".