42581097 has 12 divisors (see below), whose sum is σ = 66237444. Its totient is φ = 26203680.

The previous prime is 42581093. The next prime is 42581129. The reversal of 42581097 is 79018524.

42581097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9126441 + 33454656 = 3021^2 + 5784^2 .

It is not a de Polignac number, because 42581097 - 2² = 42581093 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (42581093) 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 11 ways as a sum of consecutive naturals, for example, 181854 + ... + 182087.

It is an arithmetic number, because the mean of its divisors is an integer number (5519787).

Almost surely, 2^42581097 is an apocalyptic number.

It is an amenable number.

42581097 is a deficient number, since it is larger than the sum of its proper divisors (23656347).

42581097 is a wasteful number, since it uses less digits than its factorization.

42581097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363960 (or 363957 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42581097 is about 6525.4192968728. The cubic root of 42581097 is about 349.1984295895.

The spelling of 42581097 in words is "forty-two million, five hundred eighty-one thousand, ninety-seven".