45105121 has 4 divisors (see below), whose sum is σ = 46660500. Its totient is φ = 43549744.

The previous prime is 45105103. The next prime is 45105143. The reversal of 45105121 is 12150154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12150154 = 2 ⋅6075077.

It can be written as a sum of positive squares in 2 ways, for example, as 25391521 + 19713600 = 5039^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 45105121 - 2¹³ = 45096929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45105161) 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, 777646 + ... + 777703.

It is an arithmetic number, because the mean of its divisors is an integer number (11665125).

Almost surely, 2^45105121 is an apocalyptic number.

It is an amenable number.

45105121 is a deficient number, since it is larger than the sum of its proper divisors (1555379).

45105121 is a wasteful number, since it uses less digits than its factorization.

45105121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555378.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 45105121 is about 6716.0346187315. The cubic root of 45105121 is about 355.9660811222.

Adding to 45105121 its reverse (12150154), we get a palindrome (57255275).

The spelling of 45105121 in words is "forty-five million, one hundred five thousand, one hundred twenty-one".