75045121 has 8 divisors (see below), whose sum is σ = 76041000. Its totient is φ = 74054400.

The previous prime is 75045119. The next prime is 75045137. The reversal of 75045121 is 12154057.

It can be written as a sum of positive squares in 4 ways, for example, as 29550096 + 45495025 = 5436^2 + 6745^2 .

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 75045121 - 2¹ = 75045119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75045101) 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, 34185 + ... + 36313.

It is an arithmetic number, because the mean of its divisors is an integer number (9505125).

Almost surely, 2^75045121 is an apocalyptic number.

It is an amenable number.

75045121 is a deficient number, since it is larger than the sum of its proper divisors (995879).

75045121 is a wasteful number, since it uses less digits than its factorization.

75045121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 75045121 is about 8662.8587083018. The cubic root of 75045121 is about 421.8008857533.

Adding to 75045121 its reverse (12154057), we get a palindrome (87199178).

The spelling of 75045121 in words is "seventy-five million, forty-five thousand, one hundred twenty-one".