45391621 has 12 divisors (see below), whose sum is σ = 50205600. Its totient is φ = 40699880.

The previous prime is 45391609. The next prime is 45391663. The reversal of 45391621 is 12619354.

45391621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45391621 - 2¹¹ = 45389573 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 (45391681) 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 11 ways as a sum of consecutive naturals, for example, 75480 + ... + 76078.

It is an arithmetic number, because the mean of its divisors is an integer number (4183800).

Almost surely, 2^45391621 is an apocalyptic number.

It is an amenable number.

45391621 is a deficient number, since it is larger than the sum of its proper divisors (4813979).

45391621 is an equidigital number, since it uses as much as digits as its factorization.

45391621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 693 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 45391621 is about 6737.3304060288. The cubic root of 45391621 is about 356.7181695019.

The spelling of 45391621 in words is "forty-five million, three hundred ninety-one thousand, six hundred twenty-one".