421073501 has 16 divisors (see below), whose sum is σ = 440510400. Its totient is φ = 402154368.

The previous prime is 421073491. The next prime is 421073531. The reversal of 421073501 is 105370124.

It is a cyclic number.

It is not a de Polignac number, because 421073501 - 2⁶ = 421073437 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 (421073531) 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 15 ways as a sum of consecutive naturals, for example, 682145 + ... + 682761.

It is an arithmetic number, because the mean of its divisors is an integer number (27531900).

Almost surely, 2^421073501 is an apocalyptic number.

It is an amenable number.

421073501 is a deficient number, since it is larger than the sum of its proper divisors (19436899).

421073501 is a wasteful number, since it uses less digits than its factorization.

421073501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 421073501 is about 20520.0755602897. The cubic root of 421073501 is about 749.5247365261.

The spelling of 421073501 in words is "four hundred twenty-one million, seventy-three thousand, five hundred one".