421552763 has 4 divisors (see below), whose sum is σ = 439881168. Its totient is φ = 403224360.

The previous prime is 421552759. The next prime is 421552771. The reversal of 421552763 is 367255124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421552763 - 2² = 421552759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421552783) 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 3 ways as a sum of consecutive naturals, for example, 9164168 + ... + 9164213.

It is an arithmetic number, because the mean of its divisors is an integer number (109970292).

Almost surely, 2^421552763 is an apocalyptic number.

421552763 is a deficient number, since it is larger than the sum of its proper divisors (18328405).

421552763 is a wasteful number, since it uses less digits than its factorization.

421552763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18328404.

The product of its digits is 50400, while the sum is 35.

The square root of 421552763 is about 20531.7501202406. The cubic root of 421552763 is about 749.8089961016.

The spelling of 421552763 in words is "four hundred twenty-one million, five hundred fifty-two thousand, seven hundred sixty-three".