9102420 has 72 divisors (see below), whose sum is σ = 28097160. Its totient is φ = 2384640.

The previous prime is 9102403. The next prime is 9102421. The reversal of 9102420 is 242019.

It can be written as a sum of positive squares in 4 ways, for example, as 30276 + 9072144 = 174^2 + 3012^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 9102393 and 9102402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9102421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10566 + ... + 11394.

Almost surely, 2^9102420 is an apocalyptic number.

9102420 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9102420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14048580).

9102420 is an abundant number, since it is smaller than the sum of its proper divisors (18994740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9102420 is a wasteful number, since it uses less digits than its factorization.

9102420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 9102420 is about 3017.0217102301. The cubic root of 9102420 is about 208.7944531049.

Adding to 9102420 its reverse (242019), we get a palindrome (9344439).

The spelling of 9102420 in words is "nine million, one hundred two thousand, four hundred twenty".