63504121 has 4 divisors (see below), whose sum is σ = 65053044. Its totient is φ = 61955200.

The previous prime is 63504101. The next prime is 63504139. The reversal of 63504121 is 12140536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 38303721 = 5020^2 + 6189^2 .

It is a cyclic number.

It is not a de Polignac number, because 63504121 - 2¹¹ = 63502073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63504092 and 63504101.

It is not an unprimeable number, because it can be changed into a prime (63504101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774400 + ... + 774481.

It is an arithmetic number, because the mean of its divisors is an integer number (16263261).

Almost surely, 2^63504121 is an apocalyptic number.

It is an amenable number.

63504121 is a deficient number, since it is larger than the sum of its proper divisors (1548923).

63504121 is a wasteful number, since it uses less digits than its factorization.

63504121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548922.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 63504121 is about 7968.9472955968. The cubic root of 63504121 is about 398.9642390631.

Adding to 63504121 its reverse (12140536), we get a palindrome (75644657).

It can be divided in two parts, 63504 and 121, that multiplied together give a square (7683984 = 2772²).

The spelling of 63504121 in words is "sixty-three million, five hundred four thousand, one hundred twenty-one".