71442787 has 8 divisors (see below), whose sum is σ = 78815520. Its totient is φ = 64338240.

The previous prime is 71442779. The next prime is 71442799. The reversal of 71442787 is 78724417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71442787 - 2³ = 71442779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71442727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66487 + ... + 67552.

It is an arithmetic number, because the mean of its divisors is an integer number (9851940).

Almost surely, 2^71442787 is an apocalyptic number.

71442787 is a deficient number, since it is larger than the sum of its proper divisors (7372733).

71442787 is a wasteful number, since it uses less digits than its factorization.

71442787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134093.

The product of its digits is 87808, while the sum is 40.

The square root of 71442787 is about 8452.3835099929. The cubic root of 71442787 is about 414.9407899268.

The spelling of 71442787 in words is "seventy-one million, four hundred forty-two thousand, seven hundred eighty-seven".