45752821 has 2 divisors, whose sum is σ = 45752822. Its totient is φ = 45752820.

The previous prime is 45752809. The next prime is 45752827. The reversal of 45752821 is 12825754.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28238596 + 17514225 = 5314^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 45752821 - 2⁹ = 45752309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45752827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22876410 + 22876411.

It is an arithmetic number, because the mean of its divisors is an integer number (22876411).

Almost surely, 2^45752821 is an apocalyptic number.

It is an amenable number.

45752821 is a deficient number, since it is larger than the sum of its proper divisors (1).

45752821 is an equidigital number, since it uses as much as digits as its factorization.

45752821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 34.

The square root of 45752821 is about 6764.0831603404. The cubic root of 45752821 is about 357.6618557365.

It can be divided in two parts, 4575 and 2821, that added together give a square (7396 = 86²).

The spelling of 45752821 in words is "forty-five million, seven hundred fifty-two thousand, eight hundred twenty-one".