421004425 has 12 divisors (see below), whose sum is σ = 525860316. Its totient is φ = 334342400.

The previous prime is 421004399. The next prime is 421004431. The reversal of 421004425 is 524400124.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 49787136 + 371217289 = 7056^2 + 19267^2 .

It is not a de Polignac number, because 421004425 - 2⁵ = 421004393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421004396 and 421004405.

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, 58036 + ... + 64885.

It is an arithmetic number, because the mean of its divisors is an integer number (43821693).

Almost surely, 2^421004425 is an apocalyptic number.

It is an amenable number.

421004425 is a deficient number, since it is larger than the sum of its proper divisors (104855891).

421004425 is a wasteful number, since it uses less digits than its factorization.

421004425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123068 (or 123063 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 421004425 is about 20518.3923590519. The cubic root of 421004425 is about 749.4837484310.

Adding to 421004425 its reverse (524400124), we get a palindrome (945404549).

The spelling of 421004425 in words is "four hundred twenty-one million, four thousand, four hundred twenty-five".