75148121 has 4 divisors (see below), whose sum is σ = 76981044. Its totient is φ = 73315200.

The previous prime is 75148093. The next prime is 75148169. The reversal of 75148121 is 12184157.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21492496 + 53655625 = 4636^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 75148121 - 2¹⁴ = 75131737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75148181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916400 + ... + 916481.

It is an arithmetic number, because the mean of its divisors is an integer number (19245261).

Almost surely, 2^75148121 is an apocalyptic number.

It is an amenable number.

75148121 is a deficient number, since it is larger than the sum of its proper divisors (1832923).

75148121 is a wasteful number, since it uses less digits than its factorization.

75148121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832922.

The product of its digits is 2240, while the sum is 29.

The square root of 75148121 is about 8668.8015896086. The cubic root of 75148121 is about 421.9937725098.

The spelling of 75148121 in words is "seventy-five million, one hundred forty-eight thousand, one hundred twenty-one".