71442499 has 4 divisors (see below), whose sum is σ = 72303336. Its totient is φ = 70581664.

The previous prime is 71442493. The next prime is 71442521. The reversal of 71442499 is 99424417.

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

It is a cyclic number.

It is not a de Polignac number, because 71442499 - 2⁵ = 71442467 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71442493) 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 3 ways as a sum of consecutive naturals, for example, 430294 + ... + 430459.

It is an arithmetic number, because the mean of its divisors is an integer number (18075834).

Almost surely, 2^71442499 is an apocalyptic number.

71442499 is a deficient number, since it is larger than the sum of its proper divisors (860837).

71442499 is an equidigital number, since it uses as much as digits as its factorization.

71442499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860836.

The product of its digits is 72576, while the sum is 40.

The square root of 71442499 is about 8452.3664733612. The cubic root of 71442499 is about 414.9402323566.

The spelling of 71442499 in words is "seventy-one million, four hundred forty-two thousand, four hundred ninety-nine".