63121025 has 24 divisors (see below), whose sum is σ = 86378400. Its totient is φ = 45372800.

The previous prime is 63121013. The next prime is 63121027. The reversal of 63121025 is 52012136.

It is not a de Polignac number, because 63121025 - 2⁶ = 63120961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63120988 and 63121006.

It is not an unprimeable number, because it can be changed into a prime (63121027) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 23186 + ... + 25764.

It is an arithmetic number, because the mean of its divisors is an integer number (3599100).

Almost surely, 2^63121025 is an apocalyptic number.

It is an amenable number.

63121025 is a deficient number, since it is larger than the sum of its proper divisors (23257375).

63121025 is a wasteful number, since it uses less digits than its factorization.

63121025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 63121025 is about 7944.8741336789. The cubic root of 63121025 is about 398.1603543133.

Subtracting from 63121025 its reverse (52012136), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 6312 and 1025, that added together give a palindrome (7337).

The spelling of 63121025 in words is "sixty-three million, one hundred twenty-one thousand, twenty-five".