71254279 has 2 divisors, whose sum is σ = 71254280. Its totient is φ = 71254278.

The previous prime is 71254277. The next prime is 71254289. The reversal of 71254279 is 97245217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71254279 - 2¹ = 71254277 is a prime.

Together with 71254277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71254273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35627139 + 35627140.

It is an arithmetic number, because the mean of its divisors is an integer number (35627140).

Almost surely, 2^71254279 is an apocalyptic number.

71254279 is a deficient number, since it is larger than the sum of its proper divisors (1).

71254279 is an equidigital number, since it uses as much as digits as its factorization.

71254279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 71254279 is about 8441.2249703464. The cubic root of 71254279 is about 414.5755160287.

The spelling of 71254279 in words is "seventy-one million, two hundred fifty-four thousand, two hundred seventy-nine".