121528725 has 24 divisors (see below), whose sum is σ = 202180512. Its totient is φ = 64411200.

The previous prime is 121528723. The next prime is 121528753. The reversal of 121528725 is 527825121.

It is not a de Polignac number, because 121528725 - 2¹ = 121528723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121528723) 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, 7255 + ... + 17195.

It is an arithmetic number, because the mean of its divisors is an integer number (8424188).

Almost surely, 2^121528725 is an apocalyptic number.

121528725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121528725 is a deficient number, since it is larger than the sum of its proper divisors (80651787).

121528725 is a wasteful number, since it uses less digits than its factorization.

121528725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117 (or 10112 counting only the distinct ones).

The product of its digits is 11200, while the sum is 33.

The square root of 121528725 is about 11024.0067579805. The cubic root of 121528725 is about 495.3281162999.

The spelling of 121528725 in words is "one hundred twenty-one million, five hundred twenty-eight thousand, seven hundred twenty-five".