71340761 has 4 divisors (see below), whose sum is σ = 71556624. Its totient is φ = 71124900.

The previous prime is 71340757. The next prime is 71340767. The reversal of 71340761 is 16704317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71340761 - 2² = 71340757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71340767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107435 + ... + 108096.

It is an arithmetic number, because the mean of its divisors is an integer number (17889156).

Almost surely, 2^71340761 is an apocalyptic number.

It is an amenable number.

71340761 is a deficient number, since it is larger than the sum of its proper divisors (215863).

71340761 is a wasteful number, since it uses less digits than its factorization.

71340761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215862.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 71340761 is about 8446.3460146977. The cubic root of 71340761 is about 414.7431729745.

The spelling of 71340761 in words is "seventy-one million, three hundred forty thousand, seven hundred sixty-one".