421111125 has 24 divisors (see below), whose sum is σ = 759125016. Its totient is φ = 224592000.

The previous prime is 421111091. The next prime is 421111151. The reversal of 421111125 is 521111124.

It can be written as a sum of positive squares in 4 ways, for example, as 42497361 + 378613764 = 6519^2 + 19458^2 .

It is not a de Polignac number, because 421111125 - 2²² = 416916821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421111098 and 421111107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186036 + ... + 188285.

It is an arithmetic number, because the mean of its divisors is an integer number (31630209).

Almost surely, 2^421111125 is an apocalyptic number.

421111125 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421111125 is a deficient number, since it is larger than the sum of its proper divisors (338013891).

421111125 is a wasteful number, since it uses less digits than its factorization.

421111125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374342 (or 374329 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 421111125 is about 20520.9923005687. The cubic root of 421111125 is about 749.5470598487.

Adding to 421111125 its reverse (521111124), we get a palindrome (942222249).

Subtracting 421111125 from its reverse (521111124), we obtain a palindrome (99999999).

The spelling of 421111125 in words is "four hundred twenty-one million, one hundred eleven thousand, one hundred twenty-five".