42081597 has 6 divisors (see below), whose sum is σ = 60784542. Its totient is φ = 28054392.

The previous prime is 42081583. The next prime is 42081619. The reversal of 42081597 is 79518024.

It can be written as a sum of positive squares in only one way, i.e., 41912676 + 168921 = 6474^2 + 411^2 .

It is not a de Polignac number, because 42081597 - 2¹¹ = 42079549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42081517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2337858 + ... + 2337875.

It is an arithmetic number, because the mean of its divisors is an integer number (10130757).

Almost surely, 2^42081597 is an apocalyptic number.

It is an amenable number.

42081597 is a deficient number, since it is larger than the sum of its proper divisors (18702945).

42081597 is a wasteful number, since it uses less digits than its factorization.

42081597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675739 (or 4675736 counting only the distinct ones).

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

The square root of 42081597 is about 6487.0329889712. The cubic root of 42081597 is about 347.8276246986.

The spelling of 42081597 in words is "forty-two million, eighty-one thousand, five hundred ninety-seven".