121554525 has 24 divisors (see below), whose sum is σ = 201730144. Its totient is φ = 64584000.

The previous prime is 121554487. The next prime is 121554529. The reversal of 121554525 is 525455121.

It is not a de Polignac number, because 121554525 - 2⁷ = 121554397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121554492 and 121554501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121554529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17850 + ... + 23700.

Almost surely, 2^121554525 is an apocalyptic number.

121554525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121554525 is a deficient number, since it is larger than the sum of its proper divisors (80175619).

121554525 is a wasteful number, since it uses less digits than its factorization.

121554525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6141 (or 6136 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 121554525 is about 11025.1768693296. The cubic root of 121554525 is about 495.3631657944.

The spelling of 121554525 in words is "one hundred twenty-one million, five hundred fifty-four thousand, five hundred twenty-five".