45242161 has 4 divisors (see below), whose sum is σ = 45256192. Its totient is φ = 45228132.

The previous prime is 45242159. The next prime is 45242209. The reversal of 45242161 is 16124254.

It is a happy number.

45242161 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45242161 - 2¹ = 45242159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45242111) 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, 520 + ... + 9526.

It is an arithmetic number, because the mean of its divisors is an integer number (11314048).

Almost surely, 2^45242161 is an apocalyptic number.

It is an amenable number.

45242161 is a deficient number, since it is larger than the sum of its proper divisors (14031).

45242161 is an equidigital number, since it uses as much as digits as its factorization.

45242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14030.

The product of its digits is 1920, while the sum is 25.

The square root of 45242161 is about 6726.2293300184. The cubic root of 45242161 is about 356.3262196207.

The spelling of 45242161 in words is "forty-five million, two hundred forty-two thousand, one hundred sixty-one".