45720851 has 4 divisors (see below), whose sum is σ = 49877304. Its totient is φ = 41564400.

The previous prime is 45720839. The next prime is 45720881. The reversal of 45720851 is 15802754.

45720851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45720851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45720881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078210 + ... + 2078231.

It is an arithmetic number, because the mean of its divisors is an integer number (12469326).

Almost surely, 2^45720851 is an apocalyptic number.

45720851 is a deficient number, since it is larger than the sum of its proper divisors (4156453).

45720851 is a wasteful number, since it uses less digits than its factorization.

45720851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156452.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 45720851 is about 6761.7195298238. The cubic root of 45720851 is about 357.5785303546.

The spelling of 45720851 in words is "forty-five million, seven hundred twenty thousand, eight hundred fifty-one".