71976251 has 2 divisors, whose sum is σ = 71976252. Its totient is φ = 71976250.

The previous prime is 71976241. The next prime is 71976253. The reversal of 71976251 is 15267917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71976251 - 2⁶ = 71976187 is a prime.

It is a Sophie Germain prime.

Together with 71976253, 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 (71976253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35988125 + 35988126.

It is an arithmetic number, because the mean of its divisors is an integer number (35988126).

Almost surely, 2^71976251 is an apocalyptic number.

71976251 is a deficient number, since it is larger than the sum of its proper divisors (1).

71976251 is an equidigital number, since it uses as much as digits as its factorization.

71976251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 71976251 is about 8483.8818355750. The cubic root of 71976251 is about 415.9710189222.

It can be divided in two parts, 71976 and 251, that added together give a palindrome (72227).

The spelling of 71976251 in words is "seventy-one million, nine hundred seventy-six thousand, two hundred fifty-one".