45252021 has 8 divisors (see below), whose sum is σ = 60589440. Its totient is φ = 30041312.

The previous prime is 45252019. The next prime is 45252029. The reversal of 45252021 is 12025254.

It is a happy number.

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 45252021 - 2¹ = 45252019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45252029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30840 + ... + 32273.

It is an arithmetic number, because the mean of its divisors is an integer number (7573680).

Almost surely, 2^45252021 is an apocalyptic number.

It is an amenable number.

45252021 is a deficient number, since it is larger than the sum of its proper divisors (15337419).

45252021 is a wasteful number, since it uses less digits than its factorization.

45252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63355.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 45252021 is about 6726.9622416065. The cubic root of 45252021 is about 356.3521034515.

Adding to 45252021 its reverse (12025254), we get a palindrome (57277275).

The spelling of 45252021 in words is "forty-five million, two hundred fifty-two thousand, twenty-one".