45121271 has 4 divisors (see below), whose sum is σ = 48592152. Its totient is φ = 41650392.

The previous prime is 45121259. The next prime is 45121291. The reversal of 45121271 is 17212154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17212154 = 2 ⋅8606077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45121271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45121201) 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 3 ways as a sum of consecutive naturals, for example, 1735421 + ... + 1735446.

It is an arithmetic number, because the mean of its divisors is an integer number (12148038).

Almost surely, 2^45121271 is an apocalyptic number.

45121271 is a deficient number, since it is larger than the sum of its proper divisors (3470881).

45121271 is a wasteful number, since it uses less digits than its factorization.

45121271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470880.

The product of its digits is 560, while the sum is 23.

The square root of 45121271 is about 6717.2368575181. The cubic root of 45121271 is about 356.0085608975.

The spelling of 45121271 in words is "forty-five million, one hundred twenty-one thousand, two hundred seventy-one".