71061251 has 2 divisors, whose sum is σ = 71061252. Its totient is φ = 71061250.

The previous prime is 71061239. The next prime is 71061253. The reversal of 71061251 is 15216017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71061251 - 2¹⁸ = 70799107 is a prime.

It is a Sophie Germain prime.

Together with 71061253, 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 (71061253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35530625 + 35530626.

It is an arithmetic number, because the mean of its divisors is an integer number (35530626).

Almost surely, 2^71061251 is an apocalyptic number.

71061251 is a deficient number, since it is larger than the sum of its proper divisors (1).

71061251 is an equidigital number, since it uses as much as digits as its factorization.

71061251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 71061251 is about 8429.7835678029. The cubic root of 71061251 is about 414.2008154721.

Adding to 71061251 its reverse (15216017), we get a palindrome (86277268).

The spelling of 71061251 in words is "seventy-one million, sixty-one thousand, two hundred fifty-one".