71248073 has 16 divisors (see below), whose sum is σ = 78383760. Its totient is φ = 64364544.

The previous prime is 71248063. The next prime is 71248091. The reversal of 71248073 is 37084217.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12694969 + 58553104 = 3563^2 + 7652^2 .

It is a cyclic number.

It is not a de Polignac number, because 71248073 - 2⁴ = 71248057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71248063) 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 15 ways as a sum of consecutive naturals, for example, 182963 + ... + 183351.

It is an arithmetic number, because the mean of its divisors is an integer number (4898985).

Almost surely, 2^71248073 is an apocalyptic number.

71248073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

71248073 is a deficient number, since it is larger than the sum of its proper divisors (7135687).

71248073 is a wasteful number, since it uses less digits than its factorization.

71248073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 71248073 is about 8440.8573616665. The cubic root of 71248073 is about 414.5634796505.

The spelling of 71248073 in words is "seventy-one million, two hundred forty-eight thousand, seventy-three".