71266251 has 16 divisors (see below), whose sum is σ = 108763904. Its totient is φ = 40660704.

The previous prime is 71266249. The next prime is 71266289. The reversal of 71266251 is 15266217.

It is not a de Polignac number, because 71266251 - 2¹ = 71266249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71266211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13656 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (6797744).

Almost surely, 2^71266251 is an apocalyptic number.

71266251 is a deficient number, since it is larger than the sum of its proper divisors (37497653).

71266251 is a wasteful number, since it uses less digits than its factorization.

71266251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250.

The product of its digits is 5040, while the sum is 30.

The square root of 71266251 is about 8441.9340793446. The cubic root of 71266251 is about 414.5987334420.

It can be divided in two parts, 71266 and 251, that added together give a palindrome (71517).

The spelling of 71266251 in words is "seventy-one million, two hundred sixty-six thousand, two hundred fifty-one".