64021025 has 12 divisors (see below), whose sum is σ = 80689404. Its totient is φ = 50376000.

The previous prime is 64021007. The next prime is 64021043. The reversal of 64021025 is 52012046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64021007) and next prime (64021043).

It can be written as a sum of positive squares in 6 ways, for example, as 30647296 + 33373729 = 5536^2 + 5777^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64021025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64020988 and 64021006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19466 + ... + 22515.

It is an arithmetic number, because the mean of its divisors is an integer number (6724117).

Almost surely, 2^64021025 is an apocalyptic number.

It is an amenable number.

64021025 is a deficient number, since it is larger than the sum of its proper divisors (16668379).

64021025 is a wasteful number, since it uses less digits than its factorization.

64021025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42052 (or 42047 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 64021025 is about 8001.3139545952. The cubic root of 64021025 is about 400.0437972877.

The spelling of 64021025 in words is "sixty-four million, twenty-one thousand, twenty-five".