121513425 has 24 divisors (see below), whose sum is σ = 219167520. Its totient is φ = 58915200.

The previous prime is 121513421. The next prime is 121513429. The reversal of 121513425 is 524315121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121513421) and next prime (121513429).

It is not a de Polignac number, because 121513425 - 2² = 121513421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121513395 and 121513404.

It is not an unprimeable number, because it can be changed into a prime (121513421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72820 + ... + 74469.

It is an arithmetic number, because the mean of its divisors is an integer number (9131980).

Almost surely, 2^121513425 is an apocalyptic number.

121513425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121513425 is a deficient number, since it is larger than the sum of its proper divisors (97654095).

121513425 is a wasteful number, since it uses less digits than its factorization.

121513425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147313 (or 147308 counting only the distinct ones).

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

The square root of 121513425 is about 11023.3127960700. The cubic root of 121513425 is about 495.3073287913.

Adding to 121513425 its reverse (524315121), we get a palindrome (645828546).

It can be divided in two parts, 12151 and 3425, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 121513425 in words is "one hundred twenty-one million, five hundred thirteen thousand, four hundred twenty-five".