54721745 has 8 divisors (see below), whose sum is σ = 70717416. Its totient is φ = 40409856.

The previous prime is 54721741. The next prime is 54721783. The reversal of 54721745 is 54712745.

It can be written as a sum of positive squares in 4 ways, for example, as 94864 + 54626881 = 308^2 + 7391^2 .

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 54721745 - 2² = 54721741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54721741) 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, 420872 + ... + 421001.

It is an arithmetic number, because the mean of its divisors is an integer number (8839677).

Almost surely, 2^54721745 is an apocalyptic number.

It is an amenable number.

54721745 is a deficient number, since it is larger than the sum of its proper divisors (15995671).

54721745 is a wasteful number, since it uses less digits than its factorization.

54721745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841891.

The product of its digits is 39200, while the sum is 35.

The square root of 54721745 is about 7397.4147511141. The cubic root of 54721745 is about 379.6528338969.

The spelling of 54721745 in words is "fifty-four million, seven hundred twenty-one thousand, seven hundred forty-five".