75098721 has 8 divisors (see below), whose sum is σ = 102021120. Its totient is φ = 49121072.

The previous prime is 75098671. The next prime is 75098753. The reversal of 75098721 is 12789057.

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 75098721 - 2¹⁰ = 75097697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75098721.

It is not an unprimeable number, because it can be changed into a prime (75098791) 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, 236001 + ... + 236318.

It is an arithmetic number, because the mean of its divisors is an integer number (12752640).

Almost surely, 2^75098721 is an apocalyptic number.

It is an amenable number.

75098721 is a deficient number, since it is larger than the sum of its proper divisors (26922399).

75098721 is a wasteful number, since it uses less digits than its factorization.

75098721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472375.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 75098721 is about 8665.9518230833. The cubic root of 75098721 is about 421.9012837836.

The spelling of 75098721 in words is "seventy-five million, ninety-eight thousand, seven hundred twenty-one".