71400281 has 2 divisors, whose sum is σ = 71400282. Its totient is φ = 71400280.

The previous prime is 71400247. The next prime is 71400283. The reversal of 71400281 is 18200417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59428681 + 11971600 = 7709^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 71400281 - 2¹⁰ = 71399257 is a prime.

It is a super-2 number, since 2×71400281² = 10196000253757922, which contains 22 as substring.

Together with 71400283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71400283) by changing a digit.

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 as a sum of consecutive naturals, namely, 35700140 + 35700141.

It is an arithmetic number, because the mean of its divisors is an integer number (35700141).

Almost surely, 2^71400281 is an apocalyptic number.

It is an amenable number.

71400281 is a deficient number, since it is larger than the sum of its proper divisors (1).

71400281 is an equidigital number, since it uses as much as digits as its factorization.

71400281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 71400281 is about 8449.8686972047. The cubic root of 71400281 is about 414.8584817704.

Adding to 71400281 its reverse (18200417), we get a palindrome (89600698).

The spelling of 71400281 in words is "seventy-one million, four hundred thousand, two hundred eighty-one".