45150721 has 16 divisors (see below), whose sum is σ = 56475648. Its totient is φ = 35067600.

The previous prime is 45150713. The next prime is 45150727. The reversal of 45150721 is 12705154.

It is a cyclic number.

It is not a de Polignac number, because 45150721 - 2³ = 45150713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45150727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28726 + ... + 30256.

It is an arithmetic number, because the mean of its divisors is an integer number (3529728).

Almost surely, 2^45150721 is an apocalyptic number.

It is an amenable number.

45150721 is a deficient number, since it is larger than the sum of its proper divisors (11324927).

45150721 is a wasteful number, since it uses less digits than its factorization.

45150721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 45150721 is about 6719.4286215422. The cubic root of 45150721 is about 356.0859979296.

Adding to 45150721 its reverse (12705154), we get a palindrome (57855875).

The spelling of 45150721 in words is "forty-five million, one hundred fifty thousand, seven hundred twenty-one".