42397655 has 4 divisors (see below), whose sum is σ = 50877192. Its totient is φ = 33918120.

The previous prime is 42397651. The next prime is 42397657. The reversal of 42397655 is 55679324.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42397655 - 2² = 42397651 is a prime.

It is a super-2 number, since 2×42397655² = 3595122298998050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42397651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4239761 + ... + 4239770.

It is an arithmetic number, because the mean of its divisors is an integer number (12719298).

Almost surely, 2^42397655 is an apocalyptic number.

42397655 is a deficient number, since it is larger than the sum of its proper divisors (8479537).

42397655 is an equidigital number, since it uses as much as digits as its factorization.

42397655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479536.

The product of its digits is 226800, while the sum is 41.

The square root of 42397655 is about 6511.3481706940. The cubic root of 42397655 is about 348.6962516142.

The spelling of 42397655 in words is "forty-two million, three hundred ninety-seven thousand, six hundred fifty-five".