421207425 has 48 divisors (see below), whose sum is σ = 778462080. Its totient is φ = 223283520.

The previous prime is 421207421. The next prime is 421207427. The reversal of 421207425 is 524702124.

It is not a de Polignac number, because 421207425 - 2² = 421207421 is a prime.

It is a super-4 number, since 4×421207425⁴ (a number of 36 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (421207421) 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 47 ways as a sum of consecutive naturals, for example, 114972 + ... + 118578.

It is an arithmetic number, because the mean of its divisors is an integer number (16217960).

Almost surely, 2^421207425 is an apocalyptic number.

421207425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421207425 is a deficient number, since it is larger than the sum of its proper divisors (357254655).

421207425 is a wasteful number, since it uses less digits than its factorization.

421207425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799 (or 3788 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 421207425 is about 20523.3385442038. The cubic root of 421207425 is about 749.6041911506.

Adding to 421207425 its reverse (524702124), we get a palindrome (945909549).

The spelling of 421207425 in words is "four hundred twenty-one million, two hundred seven thousand, four hundred twenty-five".