45493721 has 16 divisors (see below), whose sum is σ = 57926400. Its totient is φ = 34751808.

The previous prime is 45493703. The next prime is 45493741. The reversal of 45493721 is 12739454.

It is a de Polignac number, because none of the positive numbers 2^k-45493721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45493741) 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, 5981 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (3620400).

Almost surely, 2^45493721 is an apocalyptic number.

It is an amenable number.

45493721 is a deficient number, since it is larger than the sum of its proper divisors (12432679).

45493721 is a wasteful number, since it uses less digits than its factorization.

45493721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288.

The product of its digits is 30240, while the sum is 35.

The square root of 45493721 is about 6744.9033351116. The cubic root of 45493721 is about 356.9854262555.

The spelling of 45493721 in words is "forty-five million, four hundred ninety-three thousand, seven hundred twenty-one".