421101601 has 4 divisors (see below), whose sum is σ = 421718832. Its totient is φ = 420484372.

The previous prime is 421101587. The next prime is 421101607. The reversal of 421101601 is 106101124.

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 a cyclic number.

It is not a de Polignac number, because 421101601 - 2¹⁵ = 421068833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421101607) 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, 307591 + ... + 308956.

It is an arithmetic number, because the mean of its divisors is an integer number (105429708).

Almost surely, 2^421101601 is an apocalyptic number.

It is an amenable number.

421101601 is a deficient number, since it is larger than the sum of its proper divisors (617231).

421101601 is an equidigital number, since it uses as much as digits as its factorization.

421101601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617230.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 421101601 is about 20520.7602442015. The cubic root of 421101601 is about 749.5414091312.

Adding to 421101601 its reverse (106101124), we get a palindrome (527202725).

The spelling of 421101601 in words is "four hundred twenty-one million, one hundred one thousand, six hundred one".