75228121 has 8 divisors (see below), whose sum is σ = 76495104. Its totient is φ = 73967040.

The previous prime is 75228107. The next prime is 75228137. The reversal of 75228121 is 12182257.

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 75228121 - 2⁹ = 75227609 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 75228121.

It is not an unprimeable number, because it can be changed into a prime (75228821) 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 7 ways as a sum of consecutive naturals, for example, 29520 + ... + 31966.

It is an arithmetic number, because the mean of its divisors is an integer number (9561888).

Almost surely, 2^75228121 is an apocalyptic number.

75228121 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

75228121 is a deficient number, since it is larger than the sum of its proper divisors (1266983).

75228121 is a wasteful number, since it uses less digits than its factorization.

75228121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951.

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

The square root of 75228121 is about 8673.4146101752. The cubic root of 75228121 is about 422.1434658918.

The spelling of 75228121 in words is "seventy-five million, two hundred twenty-eight thousand, one hundred twenty-one".