75120491 has 4 divisors (see below), whose sum is σ = 75513984. Its totient is φ = 74727000.

The previous prime is 75120457. The next prime is 75120503. The reversal of 75120491 is 19402157.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75120491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75120191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196460 + ... + 196841.

It is an arithmetic number, because the mean of its divisors is an integer number (18878496).

Almost surely, 2^75120491 is an apocalyptic number.

75120491 is a deficient number, since it is larger than the sum of its proper divisors (393493).

75120491 is a wasteful number, since it uses less digits than its factorization.

75120491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393492.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 75120491 is about 8667.2077972090. The cubic root of 75120491 is about 421.9420474764.

The spelling of 75120491 in words is "seventy-five million, one hundred twenty thousand, four hundred ninety-one".