245012521 has 8 divisors (see below), whose sum is σ = 263995200. Its totient is φ = 226049232.

The previous prime is 245012519. The next prime is 245012527. The reversal of 245012521 is 125210542.

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 245012521 - 2¹ = 245012519 is a prime.

It is a super-2 number, since 2×245012521² = 120062270893550882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245012492 and 245012501.

It is not an unprimeable number, because it can be changed into a prime (245012527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31596 + ... + 38578.

It is an arithmetic number, because the mean of its divisors is an integer number (32999400).

Almost surely, 2^245012521 is an apocalyptic number.

It is an amenable number.

245012521 is a deficient number, since it is larger than the sum of its proper divisors (18982679).

245012521 is a wasteful number, since it uses less digits than its factorization.

245012521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9695.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 245012521 is about 15652.8758060620. The cubic root of 245012521 is about 625.7431339728.

The spelling of 245012521 in words is "two hundred forty-five million, twelve thousand, five hundred twenty-one".