42771149 has 4 divisors (see below), whose sum is σ = 43927164. Its totient is φ = 41615136.

The previous prime is 42771139. The next prime is 42771151. The reversal of 42771149 is 94117724.

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 29214025 + 13557124 = 5405^2 + 3682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42771149 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 (42771139) 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, 577952 + ... + 578025.

It is an arithmetic number, because the mean of its divisors is an integer number (10981791).

Almost surely, 2^42771149 is an apocalyptic number.

It is an amenable number.

42771149 is a deficient number, since it is larger than the sum of its proper divisors (1156015).

42771149 is a wasteful number, since it uses less digits than its factorization.

42771149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156014.

The product of its digits is 14112, while the sum is 35.

The square root of 42771149 is about 6539.9655197868. The cubic root of 42771149 is about 349.7171837778.

The spelling of 42771149 in words is "forty-two million, seven hundred seventy-one thousand, one hundred forty-nine".