45023621 has 2 divisors, whose sum is σ = 45023622. Its totient is φ = 45023620.

The previous prime is 45023611. The next prime is 45023639. The reversal of 45023621 is 12632054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44742721 + 280900 = 6689^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 45023621 - 2¹⁰ = 45022597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45023611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22511810 + 22511811.

It is an arithmetic number, because the mean of its divisors is an integer number (22511811).

Almost surely, 2^45023621 is an apocalyptic number.

It is an amenable number.

45023621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45023621 is an equidigital number, since it uses as much as digits as its factorization.

45023621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 45023621 is about 6709.9643069095. The cubic root of 45023621 is about 355.7515546568.

Adding to 45023621 its reverse (12632054), we get a palindrome (57655675).

The spelling of 45023621 in words is "forty-five million, twenty-three thousand, six hundred twenty-one".