45727121 has 4 divisors (see below), whose sum is σ = 49884144. Its totient is φ = 41570100.

The previous prime is 45727111. The next prime is 45727133. The reversal of 45727121 is 12172754.

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 not a de Polignac number, because 45727121 - 2¹⁰ = 45726097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45727111) 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, 2078495 + ... + 2078516.

It is an arithmetic number, because the mean of its divisors is an integer number (12471036).

Almost surely, 2^45727121 is an apocalyptic number.

It is an amenable number.

45727121 is a deficient number, since it is larger than the sum of its proper divisors (4157023).

45727121 is a wasteful number, since it uses less digits than its factorization.

45727121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157022.

The product of its digits is 3920, while the sum is 29.

The square root of 45727121 is about 6762.1831533906. The cubic root of 45727121 is about 357.5948753034.

Adding to 45727121 its reverse (12172754), we get a palindrome (57899875).

The spelling of 45727121 in words is "forty-five million, seven hundred twenty-seven thousand, one hundred twenty-one".