121425400 has 24 divisors (see below), whose sum is σ = 282314520. Its totient is φ = 48570080.

The previous prime is 121425391. The next prime is 121425401. The reversal of 121425400 is 4524121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121425401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 303364 + ... + 303763.

It is an arithmetic number, because the mean of its divisors is an integer number (11763105).

Almost surely, 2^121425400 is an apocalyptic number.

121425400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121425400 is an abundant number, since it is smaller than the sum of its proper divisors (160889120).

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

121425400 is a wasteful number, since it uses less digits than its factorization.

121425400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607143 (or 607134 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121425400 is about 11019.3193982206. The cubic root of 121425400 is about 495.1876987731.

Adding to 121425400 its reverse (4524121), we get a palindrome (125949521).

The spelling of 121425400 in words is "one hundred twenty-one million, four hundred twenty-five thousand, four hundred".