71054145 has 32 divisors (see below), whose sum is σ = 127132800. Its totient is φ = 37651392.

The previous prime is 71054141. The next prime is 71054161. The reversal of 71054145 is 54145017.

It is a happy number.

It is not a de Polignac number, because 71054145 - 2² = 71054141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71054141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20391 + ... + 23619.

It is an arithmetic number, because the mean of its divisors is an integer number (3972900).

Almost surely, 2^71054145 is an apocalyptic number.

It is an amenable number.

71054145 is a deficient number, since it is larger than the sum of its proper divisors (56078655).

71054145 is a wasteful number, since it uses less digits than its factorization.

71054145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 71054145 is about 8429.3620755073. The cubic root of 71054145 is about 414.1870085610.

The spelling of 71054145 in words is "seventy-one million, fifty-four thousand, one hundred forty-five".