121425153 has 4 divisors (see below), whose sum is σ = 161900208. Its totient is φ = 80950100.

The previous prime is 121425151. The next prime is 121425179. The reversal of 121425153 is 351524121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121425153 - 2¹ = 121425151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121425151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20237523 + ... + 20237528.

It is an arithmetic number, because the mean of its divisors is an integer number (40475052).

Almost surely, 2^121425153 is an apocalyptic number.

It is an amenable number.

121425153 is a deficient number, since it is larger than the sum of its proper divisors (40475055).

121425153 is an equidigital number, since it uses as much as digits as its factorization.

121425153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40475054.

The product of its digits is 1200, while the sum is 24.

The square root of 121425153 is about 11019.3081906261. The cubic root of 121425153 is about 495.1873630074.

Adding to 121425153 its reverse (351524121), we get a palindrome (472949274).

The spelling of 121425153 in words is "one hundred twenty-one million, four hundred twenty-five thousand, one hundred fifty-three".