71285775 has 48 divisors (see below), whose sum is σ = 130491648. Its totient is φ = 34048000.

The previous prime is 71285761. The next prime is 71285779. The reversal of 71285775 is 57758217.

It is not a de Polignac number, because 71285775 - 2⁸ = 71285519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71285779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57967 + ... + 59183.

It is an arithmetic number, because the mean of its divisors is an integer number (2718576).

Almost surely, 2^71285775 is an apocalyptic number.

71285775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

71285775 is a deficient number, since it is larger than the sum of its proper divisors (59205873).

71285775 is a wasteful number, since it uses less digits than its factorization.

71285775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1307 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The square root of 71285775 is about 8443.0903702377. The cubic root of 71285775 is about 414.6365909433.

The spelling of 71285775 in words is "seventy-one million, two hundred eighty-five thousand, seven hundred seventy-five".