45207121 has 4 divisors (see below), whose sum is σ = 47172672. Its totient is φ = 43241572.

The previous prime is 45207101. The next prime is 45207163. The reversal of 45207121 is 12170254.

It is a happy number.

45207121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 45207121 - 2²³ = 36818513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45207092 and 45207101.

It is not an unprimeable number, because it can be changed into a prime (45207101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982741 + ... + 982786.

It is an arithmetic number, because the mean of its divisors is an integer number (11793168).

Almost surely, 2^45207121 is an apocalyptic number.

It is an amenable number.

45207121 is a deficient number, since it is larger than the sum of its proper divisors (1965551).

45207121 is a wasteful number, since it uses less digits than its factorization.

45207121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965550.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 45207121 is about 6723.6240971666. The cubic root of 45207121 is about 356.2342044500.

Adding to 45207121 its reverse (12170254), we get a palindrome (57377375).

The spelling of 45207121 in words is "forty-five million, two hundred seven thousand, one hundred twenty-one".