121544425 has 24 divisors (see below), whose sum is σ = 161373600. Its totient is φ = 90535680.

The previous prime is 121544419. The next prime is 121544431. The reversal of 121544425 is 524445121.

It is an interprime number because it is at equal distance from previous prime (121544419) and next prime (121544431).

It is not a de Polignac number, because 121544425 - 2⁵ = 121544393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121544393 and 121544402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25857 + ... + 30193.

It is an arithmetic number, because the mean of its divisors is an integer number (6723900).

Almost surely, 2^121544425 is an apocalyptic number.

It is an amenable number.

121544425 is a deficient number, since it is larger than the sum of its proper divisors (39829175).

121544425 is a wasteful number, since it uses less digits than its factorization.

121544425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425 (or 4420 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 121544425 is about 11024.7188172760. The cubic root of 121544425 is about 495.3494454591.

Adding to 121544425 its reverse (524445121), we get a palindrome (645989546).

The spelling of 121544425 in words is "one hundred twenty-one million, five hundred forty-four thousand, four hundred twenty-five".