71451740 has 24 divisors (see below), whose sum is σ = 152511072. Its totient is φ = 28111680.

The previous prime is 71451739. The next prime is 71451749. The reversal of 71451740 is 4715417.

It is a super-2 number, since 2×71451740² = 10210702298055200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71451749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28064 + ... + 30503.

It is an arithmetic number, because the mean of its divisors is an integer number (6354628).

Almost surely, 2^71451740 is an apocalyptic number.

It is an amenable number.

71451740 is an abundant number, since it is smaller than the sum of its proper divisors (81059332).

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

71451740 is a wasteful number, since it uses less digits than its factorization.

71451740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58637 (or 58635 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 71451740 is about 8452.9131073258. The cubic root of 71451740 is about 414.9581222561.

The spelling of 71451740 in words is "seventy-one million, four hundred fifty-one thousand, seven hundred forty".