421203425 has 12 divisors (see below), whose sum is σ = 533406336. Its totient is φ = 329792400.

The previous prime is 421203421. The next prime is 421203427. The reversal of 421203425 is 524302124.

It is a happy number.

It is not a de Polignac number, because 421203425 - 2² = 421203421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421203425.

It is not an unprimeable number, because it can be changed into a prime (421203421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178061 + ... + 180410.

It is an arithmetic number, because the mean of its divisors is an integer number (44450528).

Almost surely, 2^421203425 is an apocalyptic number.

It is an amenable number.

421203425 is a deficient number, since it is larger than the sum of its proper divisors (112202911).

421203425 is a wasteful number, since it uses less digits than its factorization.

421203425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358528 (or 358523 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421203425 is about 20523.2410939403. The cubic root of 421203425 is about 749.6018182688.

Adding to 421203425 its reverse (524302124), we get a palindrome (945505549).

The spelling of 421203425 in words is "four hundred twenty-one million, two hundred three thousand, four hundred twenty-five".