42475645 has 4 divisors (see below), whose sum is σ = 50970780. Its totient is φ = 33980512.

The previous prime is 42475627. The next prime is 42475649. The reversal of 42475645 is 54657424.

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 15705369 + 26770276 = 3963^2 + 5174^2 .

It is a cyclic number.

It is not a de Polignac number, because 42475645 - 2⁵ = 42475613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42475649) 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, 4247560 + ... + 4247569.

It is an arithmetic number, because the mean of its divisors is an integer number (12742695).

Almost surely, 2^42475645 is an apocalyptic number.

It is an amenable number.

42475645 is a deficient number, since it is larger than the sum of its proper divisors (8495135).

42475645 is an equidigital number, since it uses as much as digits as its factorization.

42475645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8495134.

The product of its digits is 134400, while the sum is 37.

The square root of 42475645 is about 6517.3341942853. The cubic root of 42475645 is about 348.9099282340.

The spelling of 42475645 in words is "forty-two million, four hundred seventy-five thousand, six hundred forty-five".