71121264 has 20 divisors (see below), whose sum is σ = 183730056. Its totient is φ = 23707072.

The previous prime is 71121247. The next prime is 71121277. The reversal of 71121264 is 46212117.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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, 740799 + ... + 740894.

Almost surely, 2^71121264 is an apocalyptic number.

It is an amenable number.

71121264 is an abundant number, since it is smaller than the sum of its proper divisors (112608792).

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

71121264 is a wasteful number, since it uses less digits than its factorization.

71121264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481704 (or 1481698 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 71121264 is about 8433.3423978871. The cubic root of 71121264 is about 414.3173836387.

The spelling of 71121264 in words is "seventy-one million, one hundred twenty-one thousand, two hundred sixty-four".