71274144 has 24 divisors (see below), whose sum is σ = 187094880. Its totient is φ = 23758016.

The previous prime is 71274143. The next prime is 71274157. The reversal of 71274144 is 44147217.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (71274143) 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 3 ways as a sum of consecutive naturals, for example, 371124 + ... + 371315.

It is an arithmetic number, because the mean of its divisors is an integer number (7795620).

Almost surely, 2^71274144 is an apocalyptic number.

It is an amenable number.

71274144 is an abundant number, since it is smaller than the sum of its proper divisors (115820736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71274144 is a wasteful number, since it uses less digits than its factorization.

71274144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742452 (or 742444 counting only the distinct ones).

The product of its digits is 6272, while the sum is 30.

The square root of 71274144 is about 8442.4015540603. The cubic root of 71274144 is about 414.6140389896.

The spelling of 71274144 in words is "seventy-one million, two hundred seventy-four thousand, one hundred forty-four".