75721942 has 8 divisors (see below), whose sum is σ = 113768856. Its totient is φ = 37798992.

The previous prime is 75721907. The next prime is 75721963. The reversal of 75721942 is 24912757.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29448 + ... + 31915.

It is an arithmetic number, because the mean of its divisors is an integer number (14221107).

Almost surely, 2^75721942 is an apocalyptic number.

75721942 is a deficient number, since it is larger than the sum of its proper divisors (38046914).

75721942 is a wasteful number, since it uses less digits than its factorization.

75721942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61982.

The product of its digits is 35280, while the sum is 37.

The square root of 75721942 is about 8701.8355534910. The cubic root of 75721942 is about 423.0651461642.

The spelling of 75721942 in words is "seventy-five million, seven hundred twenty-one thousand, nine hundred forty-two".