10203120 has 120 divisors (see below), whose sum is σ = 35283456. Its totient is φ = 2640384.

The previous prime is 10203119. The next prime is 10203181. The reversal of 10203120 is 2130201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 26449 + ... + 26831.

Almost surely, 2^10203120 is an apocalyptic number.

10203120 is a gapful number since it is divisible by the number (10) 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 10203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17641728).

10203120 is an abundant number, since it is smaller than the sum of its proper divisors (25080336).

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

10203120 is a wasteful number, since it uses less digits than its factorization.

10203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 10203120 is about 3194.2323021346. The cubic root of 10203120 is about 216.8923985355.

Adding to 10203120 its reverse (2130201), we get a palindrome (12333321).

The spelling of 10203120 in words is "ten million, two hundred three thousand, one hundred twenty".