421044501 has 4 divisors (see below), whose sum is σ = 561392672. Its totient is φ = 280696332.

The previous prime is 421044487. The next prime is 421044521. The reversal of 421044501 is 105440124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421044501 - 2¹³ = 421036309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421044521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70174081 + ... + 70174086.

It is an arithmetic number, because the mean of its divisors is an integer number (140348168).

Almost surely, 2^421044501 is an apocalyptic number.

It is an amenable number.

421044501 is a deficient number, since it is larger than the sum of its proper divisors (140348171).

421044501 is a wasteful number, since it uses less digits than its factorization.

421044501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140348170.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 421044501 is about 20519.3689230444. The cubic root of 421044501 is about 749.5075291452.

Adding to 421044501 its reverse (105440124), we get a palindrome (526484625).

The spelling of 421044501 in words is "four hundred twenty-one million, forty-four thousand, five hundred one".