71325491 has 2 divisors, whose sum is σ = 71325492. Its totient is φ = 71325490.

The previous prime is 71325481. The next prime is 71325509. The reversal of 71325491 is 19452317.

It is a weak prime.

It is an emirp because it is prime and its reverse (19452317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71325491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71325431) 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 as a sum of consecutive naturals, namely, 35662745 + 35662746.

It is an arithmetic number, because the mean of its divisors is an integer number (35662746).

Almost surely, 2^71325491 is an apocalyptic number.

71325491 is a deficient number, since it is larger than the sum of its proper divisors (1).

71325491 is an equidigital number, since it uses as much as digits as its factorization.

71325491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 71325491 is about 8445.4420251400. The cubic root of 71325491 is about 414.7135798869.

The spelling of 71325491 in words is "seventy-one million, three hundred twenty-five thousand, four hundred ninety-one".