121425 has 12 divisors (see below), whose sum is σ = 200880. Its totient is φ = 64720.

The previous prime is 121421. The next prime is 121439. The reversal of 121425 is 524121.

It is not a de Polignac number, because 121425 - 2² = 121421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

121425 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121425.

It is not an unprimeable number, because it can be changed into a prime (121421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 735 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2¹²¹⁴²⁵ is an apocalyptic number.

121425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121425 is a deficient number, since it is larger than the sum of its proper divisors (79455).

121425 is a wasteful number, since it uses less digits than its factorization.

121425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1627 counting only the distinct ones).

The product of its digits is 80, while the sum is 15.

The square root of 121425 is about 348.4609016805. The cubic root of 121425 is about 49.5187155023.

Adding to 121425 its reverse (524121), we get a palindrome (645546).

The spelling of 121425 in words is "one hundred twenty-one thousand, four hundred twenty-five".