42545149 has 4 divisors (see below), whose sum is σ = 42560764. Its totient is φ = 42529536.

The previous prime is 42545143. The next prime is 42545159. The reversal of 42545149 is 94154524.

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 20520900 + 22024249 = 4530^2 + 4693^2 .

It is a cyclic number.

It is not a de Polignac number, because 42545149 - 2¹¹ = 42543101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545143) 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, 2532 + ... + 9565.

It is an arithmetic number, because the mean of its divisors is an integer number (10640191).

Almost surely, 2^42545149 is an apocalyptic number.

It is an amenable number.

42545149 is a deficient number, since it is larger than the sum of its proper divisors (15615).

42545149 is a wasteful number, since it uses less digits than its factorization.

42545149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15614.

The product of its digits is 28800, while the sum is 34.

The square root of 42545149 is about 6522.6642562683. The cubic root of 42545149 is about 349.1001346480.

The spelling of 42545149 in words is "forty-two million, five hundred forty-five thousand, one hundred forty-nine".