4253245120521 has 6 divisors (see below), whose sum is σ = 6143576285210. Its totient is φ = 2835496747008.

The previous prime is 4253245120507. The next prime is 4253245120549. The reversal of 4253245120521 is 1250215423524.

4253245120521 is a `hidden beast` number, since 4 + 2 + 5 + 3 + 2 + 4 + 5 + 120 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4201007732496 + 52237388025 = 2049636^2 + 228555^2 .

It is not a de Polignac number, because 4253245120521 - 2⁵ = 4253245120489 is a prime.

It is a super-2 number, since 2×4253245120521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4253245120571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236291395576 + ... + 236291395593.

Almost surely, 2^{4253245120521} is an apocalyptic number.

It is an amenable number.

4253245120521 is a deficient number, since it is larger than the sum of its proper divisors (1890331164689).

4253245120521 is a wasteful number, since it uses less digits than its factorization.

4253245120521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472582791175 (or 472582791172 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 4253245120521 in words is "four trillion, two hundred fifty-three billion, two hundred forty-five million, one hundred twenty thousand, five hundred twenty-one".