421105001 has 4 divisors (see below), whose sum is σ = 421366404. Its totient is φ = 420843600.

The previous prime is 421104991. The next prime is 421105031. The reversal of 421105001 is 100501124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 136305625 + 284799376 = 11675^2 + 16876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421105001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421105031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128270 + ... + 131511.

It is an arithmetic number, because the mean of its divisors is an integer number (105341601).

Almost surely, 2^421105001 is an apocalyptic number.

It is an amenable number.

421105001 is a deficient number, since it is larger than the sum of its proper divisors (261403).

421105001 is a wasteful number, since it uses less digits than its factorization.

421105001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261402.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 421105001 is about 20520.8430869689. The cubic root of 421105001 is about 749.5434264068.

Adding to 421105001 its reverse (100501124), we get a palindrome (521606125).

The spelling of 421105001 in words is "four hundred twenty-one million, one hundred five thousand, one".