42795981 has 12 divisors (see below), whose sum is σ = 61934652. Its totient is φ = 28476096.

The previous prime is 42795979. The next prime is 42796003. The reversal of 42795981 is 18959724.

It can be written as a sum of positive squares in 2 ways, for example, as 20385225 + 22410756 = 4515^2 + 4734^2 .

It is not a de Polignac number, because 42795981 - 2¹ = 42795979 is a prime.

It is a super-2 number, since 2×42795981² = 3662991979504722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42795911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (5161221).

Almost surely, 2^42795981 is an apocalyptic number.

It is an amenable number.

42795981 is a deficient number, since it is larger than the sum of its proper divisors (19138671).

42795981 is a wasteful number, since it uses less digits than its factorization.

42795981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100 (or 9097 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 42795981 is about 6541.8637252697. The cubic root of 42795981 is about 349.7848500844.

The spelling of 42795981 in words is "forty-two million, seven hundred ninety-five thousand, nine hundred eighty-one".