421536025 has 12 divisors (see below), whose sum is σ = 540729900. Its totient is φ = 325599680.

The previous prime is 421536013. The next prime is 421536041. The reversal of 421536025 is 520635124.

It can be written as a sum of positive squares in 6 ways, for example, as 793881 + 420742144 = 891^2 + 20512^2 .

It is a de Polignac number, because none of the positive numbers 2^k-421536025 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421535984 and 421536002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289990 + ... + 291439.

It is an arithmetic number, because the mean of its divisors is an integer number (45060825).

Almost surely, 2^421536025 is an apocalyptic number.

It is an amenable number.

421536025 is a deficient number, since it is larger than the sum of its proper divisors (119193875).

421536025 is a wasteful number, since it uses less digits than its factorization.

421536025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581468 (or 581463 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 421536025 is about 20531.3425035968. The cubic root of 421536025 is about 749.7990721014.

Subtracting 421536025 from its reverse (520635124), we obtain a palindrome (99099099).

The spelling of 421536025 in words is "four hundred twenty-one million, five hundred thirty-six thousand, twenty-five".