75282121 has 4 divisors (see below), whose sum is σ = 77032912. Its totient is φ = 73531332.

The previous prime is 75282073. The next prime is 75282127. The reversal of 75282121 is 12128257.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75282121 - 2⁷ = 75281993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75282121.

It is not an unprimeable number, because it can be changed into a prime (75282127) 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, 875331 + ... + 875416.

It is an arithmetic number, because the mean of its divisors is an integer number (19258228).

Almost surely, 2^75282121 is an apocalyptic number.

It is an amenable number.

75282121 is a deficient number, since it is larger than the sum of its proper divisors (1750791).

75282121 is a wasteful number, since it uses less digits than its factorization.

75282121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750790.

The product of its digits is 2240, while the sum is 28.

The square root of 75282121 is about 8676.5270125782. The cubic root of 75282121 is about 422.2444489402.

The spelling of 75282121 in words is "seventy-five million, two hundred eighty-two thousand, one hundred twenty-one".