42081697 has 16 divisors (see below), whose sum is σ = 51920640. Its totient is φ = 33308352.

The previous prime is 42081671. The next prime is 42081701. The reversal of 42081697 is 79618024.

It is not a de Polignac number, because 42081697 - 2⁷ = 42081569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42081667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163 + ... + 9175.

It is an arithmetic number, because the mean of its divisors is an integer number (3245040).

Almost surely, 2^42081697 is an apocalyptic number.

It is an amenable number.

42081697 is a deficient number, since it is larger than the sum of its proper divisors (9838943).

42081697 is a wasteful number, since it uses less digits than its factorization.

42081697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9072.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 42081697 is about 6487.0406966505. The cubic root of 42081697 is about 347.8279002168.

It can be divided in two parts, 42081 and 697, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42081697 in words is "forty-two million, eighty-one thousand, six hundred ninety-seven".