42094461281 has 4 divisors (see below), whose sum is σ = 42312567492. Its totient is φ = 41876355072.

The previous prime is 42094461239. The next prime is 42094461293. The reversal of 42094461281 is 18216449024.

It is a happy number.

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 30499478881 + 11594982400 = 174641^2 + 107680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42094461281 is a prime.

It is a super-2 number, since 2×42094461281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42094461881) 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, 109052816 + ... + 109053201.

It is an arithmetic number, because the mean of its divisors is an integer number (10578141873).

Almost surely, 2^42094461281 is an apocalyptic number.

It is an amenable number.

42094461281 is a deficient number, since it is larger than the sum of its proper divisors (218106211).

42094461281 is a wasteful number, since it uses less digits than its factorization.

42094461281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218106210.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 42094461281 in words is "forty-two billion, ninety-four million, four hundred sixty-one thousand, two hundred eighty-one".