71429261 has 2 divisors, whose sum is σ = 71429262. Its totient is φ = 71429260.

The previous prime is 71429209. The next prime is 71429269. The reversal of 71429261 is 16292417.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 1188100 = 8381^2 + 1090^2 .

It is an emirp because it is prime and its reverse (16292417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71429261 is a prime.

It is a super-2 number, since 2×71429261² = 10204278654012242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71429269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714630 + 35714631.

It is an arithmetic number, because the mean of its divisors is an integer number (35714631).

Almost surely, 2^71429261 is an apocalyptic number.

It is an amenable number.

71429261 is a deficient number, since it is larger than the sum of its proper divisors (1).

71429261 is an equidigital number, since it uses as much as digits as its factorization.

71429261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 71429261 is about 8451.5833427826. The cubic root of 71429261 is about 414.9146018697.

The spelling of 71429261 in words is "seventy-one million, four hundred twenty-nine thousand, two hundred sixty-one".