71259912 has 80 divisors (see below), whose sum is σ = 200818860. Its totient is φ = 23607936.

The previous prime is 71259893. The next prime is 71259953. The reversal of 71259912 is 21995217.

It can be written as a sum of positive squares in 2 ways, for example, as 70660836 + 599076 = 8406^2 + 774^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 19 ways as a sum of consecutive naturals, for example, 179298 + ... + 179694.

Almost surely, 2^71259912 is an apocalyptic number.

71259912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71259912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100409430).

71259912 is an abundant number, since it is smaller than the sum of its proper divisors (129558948).

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

71259912 is a wasteful number, since it uses less digits than its factorization.

71259912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 679 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 71259912 is about 8441.5586238561. The cubic root of 71259912 is about 414.5864404830.

The spelling of 71259912 in words is "seventy-one million, two hundred fifty-nine thousand, nine hundred twelve".