71235965 has 4 divisors (see below), whose sum is σ = 85483164. Its totient is φ = 56988768.

The previous prime is 71235961. The next prime is 71235979. The reversal of 71235965 is 56953217.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55323844 + 15912121 = 7438^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 71235965 - 2² = 71235961 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 (71235961) 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, 7123592 + ... + 7123601.

It is an arithmetic number, because the mean of its divisors is an integer number (21370791).

Almost surely, 2^71235965 is an apocalyptic number.

It is an amenable number.

71235965 is a deficient number, since it is larger than the sum of its proper divisors (14247199).

71235965 is a wasteful number, since it uses less digits than its factorization.

71235965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247198.

The product of its digits is 56700, while the sum is 38.

The square root of 71235965 is about 8440.1401054722. The cubic root of 71235965 is about 414.5399944821.

The spelling of 71235965 in words is "seventy-one million, two hundred thirty-five thousand, nine hundred sixty-five".