42545845 has 16 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 31831488.

The previous prime is 42545843. The next prime is 42545851. The reversal of 42545845 is 54854524.

It is a cyclic number.

It is not a de Polignac number, because 42545845 - 2¹ = 42545843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4671 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^42545845 is an apocalyptic number.

It is an amenable number.

42545845 is a deficient number, since it is larger than the sum of its proper divisors (11886155).

42545845 is a wasteful number, since it uses less digits than its factorization.

42545845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772.

The product of its digits is 128000, while the sum is 37.

The square root of 42545845 is about 6522.7176084819. The cubic root of 42545845 is about 349.1020382913.

It can be divided in two parts, 425458 and 45, that added together give a triangular number (425503 = T₉₂₂).

The spelling of 42545845 in words is "forty-two million, five hundred forty-five thousand, eight hundred forty-five".