71280452 has 12 divisors (see below), whose sum is σ = 126786156. Its totient is φ = 35055840.

The previous prime is 71280431. The next prime is 71280467. The reversal of 71280452 is 25408217.

It can be written as a sum of positive squares in 2 ways, for example, as 6895876 + 64384576 = 2626^2 + 8024^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145823 + ... + 146310.

It is an arithmetic number, because the mean of its divisors is an integer number (10565513).

Almost surely, 2^71280452 is an apocalyptic number.

It is an amenable number.

71280452 is a deficient number, since it is larger than the sum of its proper divisors (55505704).

71280452 is a wasteful number, since it uses less digits than its factorization.

71280452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292198 (or 292196 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 71280452 is about 8442.7751361741. The cubic root of 71280452 is about 414.6262702049.

Adding to 71280452 its reverse (25408217), we get a palindrome (96688669).

The spelling of 71280452 in words is "seventy-one million, two hundred eighty thousand, four hundred fifty-two".