71425281 has 32 divisors (see below), whose sum is σ = 103442688. Its totient is φ = 43718400.

The previous prime is 71425273. The next prime is 71425301. The reversal of 71425281 is 18252417.

It is not a de Polignac number, because 71425281 - 2³ = 71425273 is a prime.

It is a super-2 number, since 2×71425281² = 10203141531857922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71425201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257715 + ... + 257991.

It is an arithmetic number, because the mean of its divisors is an integer number (3232584).

Almost surely, 2^71425281 is an apocalyptic number.

It is an amenable number.

71425281 is a deficient number, since it is larger than the sum of its proper divisors (32017407).

71425281 is a wasteful number, since it uses less digits than its factorization.

71425281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 4480, while the sum is 30.

The square root of 71425281 is about 8451.3478806638. The cubic root of 71425281 is about 414.9068954538.

Adding to 71425281 its reverse (18252417), we get a palindrome (89677698).

The spelling of 71425281 in words is "seventy-one million, four hundred twenty-five thousand, two hundred eighty-one".