421731101 has 6 divisors (see below), whose sum is σ = 463555806. Its totient is φ = 383391800.

The previous prime is 421731097. The next prime is 421731157. The reversal of 421731101 is 101137124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 410103001 + 11628100 = 20251^2 + 3410^2 .

It is not a de Polignac number, because 421731101 - 2² = 421731097 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 (421731181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1742570 + ... + 1742811.

It is an arithmetic number, because the mean of its divisors is an integer number (77259301).

Almost surely, 2^421731101 is an apocalyptic number.

It is an amenable number.

421731101 is a deficient number, since it is larger than the sum of its proper divisors (41824705).

421731101 is a wasteful number, since it uses less digits than its factorization.

421731101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485403 (or 3485392 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 421731101 is about 20536.0926419804. The cubic root of 421731101 is about 749.9147168213.

Adding to 421731101 its reverse (101137124), we get a palindrome (522868225).

The spelling of 421731101 in words is "four hundred twenty-one million, seven hundred thirty-one thousand, one hundred one".