121425415 has 4 divisors (see below), whose sum is σ = 145710504. Its totient is φ = 97140328.

The previous prime is 121425401. The next prime is 121425457. The reversal of 121425415 is 514524121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 514524121 = 9539 ⋅53939.

It is a cyclic number.

It is not a de Polignac number, because 121425415 - 2¹⁷ = 121294343 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121425415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12142537 + ... + 12142546.

It is an arithmetic number, because the mean of its divisors is an integer number (36427626).

Almost surely, 2^121425415 is an apocalyptic number.

121425415 is a deficient number, since it is larger than the sum of its proper divisors (24285089).

121425415 is an equidigital number, since it uses as much as digits as its factorization.

121425415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24285088.

The product of its digits is 1600, while the sum is 25.

The square root of 121425415 is about 11019.3200788433. The cubic root of 121425415 is about 495.1877191637.

Adding to 121425415 its reverse (514524121), we get a palindrome (635949536).

The spelling of 121425415 in words is "one hundred twenty-one million, four hundred twenty-five thousand, four hundred fifteen".