71012261 has 4 divisors (see below), whose sum is σ = 71349024. Its totient is φ = 70675500.

The previous prime is 71012257. The next prime is 71012309. The reversal of 71012261 is 16221017.

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 71012261 - 2² = 71012257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71012761) 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, 168065 + ... + 168486.

It is an arithmetic number, because the mean of its divisors is an integer number (17837256).

Almost surely, 2^71012261 is an apocalyptic number.

It is an amenable number.

71012261 is a deficient number, since it is larger than the sum of its proper divisors (336763).

71012261 is a wasteful number, since it uses less digits than its factorization.

71012261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336762.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 71012261 is about 8426.8772982642. The cubic root of 71012261 is about 414.1056095170.

Adding to 71012261 its reverse (16221017), we get a palindrome (87233278).

The spelling of 71012261 in words is "seventy-one million, twelve thousand, two hundred sixty-one".