45459821 has 12 divisors (see below), whose sum is σ = 50307516. Its totient is φ = 41046720.

The previous prime is 45459793. The next prime is 45459833. The reversal of 45459821 is 12895454.

It can be written as a sum of positive squares in 2 ways, for example, as 5593225 + 39866596 = 2365^2 + 6314^2 .

It is a de Polignac number, because none of the positive numbers 2^k-45459821 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 (45459851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17801 + ... + 20193.

It is an arithmetic number, because the mean of its divisors is an integer number (4192293).

Almost surely, 2^45459821 is an apocalyptic number.

It is an amenable number.

45459821 is a deficient number, since it is larger than the sum of its proper divisors (4847695).

45459821 is a wasteful number, since it uses less digits than its factorization.

45459821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2561 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 45459821 is about 6742.3898582031. The cubic root of 45459821 is about 356.8967340665.

The spelling of 45459821 in words is "forty-five million, four hundred fifty-nine thousand, eight hundred twenty-one".