45021730 has 16 divisors (see below), whose sum is σ = 87273144. Its totient is φ = 16623360.

The previous prime is 45021719. The next prime is 45021737. The reversal of 45021730 is 3712054.

It can be written as a sum of positive squares in 4 ways, for example, as 38975049 + 6046681 = 6243^2 + 2459^2 .

It is not an unprimeable number, because it can be changed into a prime (45021737) 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, 173031 + ... + 173290.

Almost surely, 2^45021730 is an apocalyptic number.

45021730 is a deficient number, since it is larger than the sum of its proper divisors (42251414).

45021730 is a wasteful number, since it uses less digits than its factorization.

45021730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346341.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 45021730 is about 6709.8233955895. The cubic root of 45021730 is about 355.7465740444.

Adding to 45021730 its reverse (3712054), we get a palindrome (48733784).

The spelling of 45021730 in words is "forty-five million, twenty-one thousand, seven hundred thirty".