71507741 has 2 divisors, whose sum is σ = 71507742. Its totient is φ = 71507740.

The previous prime is 71507701. The next prime is 71507743. The reversal of 71507741 is 14770517.

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., 58583716 + 12924025 = 7654^2 + 3595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71507741 is a prime.

It is a super-2 number, since 2×71507741² = 10226714045846162, which contains 22 as substring.

Together with 71507743, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71507698 and 71507707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71507743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35753870 + 35753871.

It is an arithmetic number, because the mean of its divisors is an integer number (35753871).

Almost surely, 2^71507741 is an apocalyptic number.

It is an amenable number.

71507741 is a deficient number, since it is larger than the sum of its proper divisors (1).

71507741 is an equidigital number, since it uses as much as digits as its factorization.

71507741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 71507741 is about 8456.2249851810. The cubic root of 71507741 is about 415.0665031083.

The spelling of 71507741 in words is "seventy-one million, five hundred seven thousand, seven hundred forty-one".