42635897 has 4 divisors (see below), whose sum is σ = 42654336. Its totient is φ = 42617460.

The previous prime is 42635893. The next prime is 42635899. The reversal of 42635897 is 79853624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42635897 - 2² = 42635893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42635891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5153 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (10663584).

Almost surely, 2^42635897 is an apocalyptic number.

It is an amenable number.

42635897 is a deficient number, since it is larger than the sum of its proper divisors (18439).

42635897 is a wasteful number, since it uses less digits than its factorization.

42635897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18438.

The product of its digits is 362880, while the sum is 44.

The square root of 42635897 is about 6529.6169106618. The cubic root of 42635897 is about 349.3481663824.

The spelling of 42635897 in words is "forty-two million, six hundred thirty-five thousand, eight hundred ninety-seven".