42497665 has 8 divisors (see below), whose sum is σ = 58282560. Its totient is φ = 29141232.

The previous prime is 42497657. The next prime is 42497681. The reversal of 42497665 is 56679424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42497665 - 2³ = 42497657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607075 + ... + 607144.

It is an arithmetic number, because the mean of its divisors is an integer number (7285320).

Almost surely, 2^42497665 is an apocalyptic number.

It is an amenable number.

42497665 is a deficient number, since it is larger than the sum of its proper divisors (15784895).

42497665 is a wasteful number, since it uses less digits than its factorization.

42497665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214231.

The product of its digits is 362880, while the sum is 43.

The square root of 42497665 is about 6519.0233164179. The cubic root of 42497665 is about 348.9702111667.

It can be divided in two parts, 424 and 97665, that added together give a palindrome (98089).

The spelling of 42497665 in words is "forty-two million, four hundred ninety-seven thousand, six hundred sixty-five".