45243021 has 8 divisors (see below), whose sum is σ = 60361344. Its totient is φ = 30143360.

The previous prime is 45243013. The next prime is 45243041. The reversal of 45243021 is 12034254.

45243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45243021 - 2³ = 45243013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45243041) 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 7 ways as a sum of consecutive naturals, for example, 2620 + ... + 9866.

It is an arithmetic number, because the mean of its divisors is an integer number (7545168).

Almost surely, 2^45243021 is an apocalyptic number.

It is an amenable number.

45243021 is a deficient number, since it is larger than the sum of its proper divisors (15118323).

45243021 is a wasteful number, since it uses less digits than its factorization.

45243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 45243021 is about 6726.2932585489. The cubic root of 45243021 is about 356.3284773864.

Adding to 45243021 its reverse (12034254), we get a palindrome (57277275).

The spelling of 45243021 in words is "forty-five million, two hundred forty-three thousand, twenty-one".