42542345 has 4 divisors (see below), whose sum is σ = 51050820. Its totient is φ = 34033872.

The previous prime is 42542329. The next prime is 42542377. The reversal of 42542345 is 54324524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 35295481 = 2692^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 42542345 - 2⁴ = 42542329 is a prime.

It is a super-2 number, since 2×42542345² = 3619702236198050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254230 + ... + 4254239.

It is an arithmetic number, because the mean of its divisors is an integer number (12762705).

Almost surely, 2^42542345 is an apocalyptic number.

It is an amenable number.

42542345 is a deficient number, since it is larger than the sum of its proper divisors (8508475).

42542345 is an equidigital number, since it uses as much as digits as its factorization.

42542345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508474.

The product of its digits is 19200, while the sum is 29.

The square root of 42542345 is about 6522.4493098835. The cubic root of 42542345 is about 349.0924651619.

Adding to 42542345 its reverse (54324524), we get a palindrome (96866869).

The spelling of 42542345 in words is "forty-two million, five hundred forty-two thousand, three hundred forty-five".