71442513 has 8 divisors (see below), whose sum is σ = 105840800. Its totient is φ = 47628324.

The previous prime is 71442493. The next prime is 71442521. The reversal of 71442513 is 31524417.

71442513 is a `hidden beast` number, since 7 + 144 + 2 + 513 = 666.

It is not a de Polignac number, because 71442513 - 2⁸ = 71442257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2646019 = 71442513 / (7 + 1 + 4 + 4 + 2 + 5 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71442533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322983 + ... + 1323036.

It is an arithmetic number, because the mean of its divisors is an integer number (13230100).

Almost surely, 2^71442513 is an apocalyptic number.

It is an amenable number.

71442513 is a deficient number, since it is larger than the sum of its proper divisors (34398287).

71442513 is a wasteful number, since it uses less digits than its factorization.

71442513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646028 (or 2646022 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 71442513 is about 8452.3673015316. The cubic root of 71442513 is about 414.9402594608.

The spelling of 71442513 in words is "seventy-one million, four hundred forty-two thousand, five hundred thirteen".