421256475 has 36 divisors (see below), whose sum is σ = 755625000. Its totient is φ = 224340480.

The previous prime is 421256471. The next prime is 421256483. The reversal of 421256475 is 574652124.

It is a happy number.

421256475 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 5 + 647 + 5 = 666.

It is not a de Polignac number, because 421256475 - 2² = 421256471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421256471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 280276 + ... + 281774.

Almost surely, 2^421256475 is an apocalyptic number.

421256475 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421256475 is a deficient number, since it is larger than the sum of its proper divisors (334368525).

421256475 is a wasteful number, since it uses less digits than its factorization.

421256475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2756 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 421256475 is about 20524.5334904353. The cubic root of 421256475 is about 749.6332873917.

The spelling of 421256475 in words is "four hundred twenty-one million, two hundred fifty-six thousand, four hundred seventy-five".