120840225 has 48 divisors (see below), whose sum is σ = 221128704. Its totient is φ = 57736000.

The previous prime is 120840221. The next prime is 120840227. The reversal of 120840225 is 522048021.

It is not a de Polignac number, because 120840225 - 2² = 120840221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120840195 and 120840204.

It is not an unprimeable number, because it can be changed into a prime (120840221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57544 + ... + 59606.

It is an arithmetic number, because the mean of its divisors is an integer number (4606848).

Almost surely, 2^120840225 is an apocalyptic number.

120840225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120840225 is a deficient number, since it is larger than the sum of its proper divisors (100288479).

120840225 is a wasteful number, since it uses less digits than its factorization.

120840225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2153 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 120840225 is about 10992.7351009655. The cubic root of 120840225 is about 494.3909456441.

Adding to 120840225 its reverse (522048021), we get a palindrome (642888246).

The spelling of 120840225 in words is "one hundred twenty million, eight hundred forty thousand, two hundred twenty-five".