121435425 has 18 divisors (see below), whose sum is σ = 217504742. Its totient is φ = 64765440.

The previous prime is 121435421. The next prime is 121435429. The reversal of 121435425 is 524534121.

It is an interprime number because it is at equal distance from previous prime (121435421) and next prime (121435429).

It can be written as a sum of positive squares in 3 ways, for example, as 2712609 + 118722816 = 1647^2 + 10896^2 .

It is not a de Polignac number, because 121435425 - 2² = 121435421 is a prime.

It is a super-3 number, since 3×121435425³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121435421) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 269632 + ... + 270081.

Almost surely, 2^121435425 is an apocalyptic number.

121435425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121435425 is a deficient number, since it is larger than the sum of its proper divisors (96069317).

121435425 is a wasteful number, since it uses less digits than its factorization.

121435425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539729 (or 539721 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 121435425 is about 11019.7742717353. The cubic root of 121435425 is about 495.2013261252.

Adding to 121435425 its reverse (524534121), we get a palindrome (645969546).

The spelling of 121435425 in words is "one hundred twenty-one million, four hundred thirty-five thousand, four hundred twenty-five".