71873745 has 32 divisors (see below), whose sum is σ = 119992320. Its totient is φ = 36691200.

The previous prime is 71873731. The next prime is 71873749. The reversal of 71873745 is 54737817.

It is a happy number.

It is not a de Polignac number, because 71873745 - 2⁴ = 71873729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71873697 and 71873706.

It is not an unprimeable number, because it can be changed into a prime (71873749) 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, 54595 + ... + 55895.

It is an arithmetic number, because the mean of its divisors is an integer number (3749760).

Almost surely, 2^71873745 is an apocalyptic number.

It is an amenable number.

71873745 is a deficient number, since it is larger than the sum of its proper divisors (48118575).

71873745 is a wasteful number, since it uses less digits than its factorization.

71873745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its digits is 164640, while the sum is 42.

The square root of 71873745 is about 8477.8384627215. The cubic root of 71873745 is about 415.7734547600.

The spelling of 71873745 in words is "seventy-one million, eight hundred seventy-three thousand, seven hundred forty-five".