121553025 has 48 divisors (see below), whose sum is σ = 220485888. Its totient is φ = 58600000.

The previous prime is 121553023. The next prime is 121553041. The reversal of 121553025 is 520355121.

It is a happy number.

It is not a de Polignac number, because 121553025 - 2¹ = 121553023 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121552986 and 121553004.

It is not an unprimeable number, because it can be changed into a prime (121553023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206782 + ... + 207368.

It is an arithmetic number, because the mean of its divisors is an integer number (4593456).

Almost surely, 2^121553025 is an apocalyptic number.

121553025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121553025 is a deficient number, since it is larger than the sum of its proper divisors (98932863).

121553025 is a wasteful number, since it uses less digits than its factorization.

121553025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 121553025 is about 11025.1088430001. The cubic root of 121553025 is about 495.3611281689.

The spelling of 121553025 in words is "one hundred twenty-one million, five hundred fifty-three thousand, twenty-five".