71538465 has 48 divisors (see below), whose sum is σ = 124803072. Its totient is φ = 34868736.

The previous prime is 71538461. The next prime is 71538491. The reversal of 71538465 is 56483517.

It is not a de Polignac number, because 71538465 - 2² = 71538461 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71538461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 563232 + ... + 563358.

It is an arithmetic number, because the mean of its divisors is an integer number (2600064).

Almost surely, 2^71538465 is an apocalyptic number.

It is an amenable number.

71538465 is a deficient number, since it is larger than the sum of its proper divisors (53264607).

71538465 is a wasteful number, since it uses less digits than its factorization.

71538465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 199 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 71538465 is about 8458.0414399552. The cubic root of 71538465 is about 415.1259403901.

The spelling of 71538465 in words is "seventy-one million, five hundred thirty-eight thousand, four hundred sixty-five".