71815741 has 2 divisors, whose sum is σ = 71815742. Its totient is φ = 71815740.

The previous prime is 71815703. The next prime is 71815753. The reversal of 71815741 is 14751817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70913241 + 902500 = 8421^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 71815741 - 2¹⁵ = 71782973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71815697 and 71815706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71815781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35907870 + 35907871.

It is an arithmetic number, because the mean of its divisors is an integer number (35907871).

Almost surely, 2^71815741 is an apocalyptic number.

It is an amenable number.

71815741 is a deficient number, since it is larger than the sum of its proper divisors (1).

71815741 is an equidigital number, since it uses as much as digits as its factorization.

71815741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 71815741 is about 8474.4168530938. The cubic root of 71815741 is about 415.6615779593.

The spelling of 71815741 in words is "seventy-one million, eight hundred fifteen thousand, seven hundred forty-one".