64722025 has 9 divisors (see below), whose sum is σ = 80305221. Its totient is φ = 51745440.

The previous prime is 64721981. The next prime is 64722029. The reversal of 64722025 is 52022746.

The square root of 64722025 is 8045.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14538969 + 50183056 = 3813^2 + 7084^2 .

It is not a de Polignac number, because 64722025 - 2⁷ = 64721897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64721984 and 64722002.

It is not an unprimeable number, because it can be changed into a prime (64722029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39421 + ... + 41029.

Almost surely, 2^64722025 is an apocalyptic number.

64722025 is the 8045-th square number.

64722025 is the 4023-rd centered octagonal number.

It is an amenable number.

64722025 is a deficient number, since it is larger than the sum of its proper divisors (15583196).

64722025 is an frugal number, since it uses more digits than its factorization.

64722025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The cubic root of 64722025 is about 401.4985972541.

The spelling of 64722025 in words is "sixty-four million, seven hundred twenty-two thousand, twenty-five".