71257965 has 16 divisors (see below), whose sum is σ = 120719808. Its totient is φ = 35768576.

The previous prime is 71257951. The next prime is 71258003. The reversal of 71257965 is 56975217.

It is a cyclic number.

It is not a de Polignac number, because 71257965 - 2⁹ = 71257453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139467 + ... + 139976.

It is an arithmetic number, because the mean of its divisors is an integer number (7544988).

Almost surely, 2^71257965 is an apocalyptic number.

It is an amenable number.

71257965 is a deficient number, since it is larger than the sum of its proper divisors (49461843).

71257965 is a wasteful number, since it uses less digits than its factorization.

71257965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279468.

The product of its digits is 132300, while the sum is 42.

The square root of 71257965 is about 8441.4433007632. The cubic root of 71257965 is about 414.5826646005.

The spelling of 71257965 in words is "seventy-one million, two hundred fifty-seven thousand, nine hundred sixty-five".