71545149 has 12 divisors (see below), whose sum is σ = 111292636. Its totient is φ = 44027712.

The previous prime is 71545141. The next prime is 71545153. The reversal of 71545149 is 94154517.

71545149 is a `hidden beast` number, since 71 + 545 + 1 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15069924 + 56475225 = 3882^2 + 7515^2 .

It is not a de Polignac number, because 71545149 - 2³ = 71545141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71545141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305632 + ... + 305865.

Almost surely, 2^71545149 is an apocalyptic number.

It is an amenable number.

71545149 is a deficient number, since it is larger than the sum of its proper divisors (39747487).

71545149 is a wasteful number, since it uses less digits than its factorization.

71545149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611516 (or 611513 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 71545149 is about 8458.4365576624. The cubic root of 71545149 is about 415.1388687049.

The spelling of 71545149 in words is "seventy-one million, five hundred forty-five thousand, one hundred forty-nine".