121525541 has 4 divisors (see below), whose sum is σ = 121579584. Its totient is φ = 121471500.

The previous prime is 121525499. The next prime is 121525543. The reversal of 121525541 is 145525121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121525541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121525541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23495 + ... + 28196.

It is an arithmetic number, because the mean of its divisors is an integer number (30394896).

Almost surely, 2^121525541 is an apocalyptic number.

It is an amenable number.

121525541 is a deficient number, since it is larger than the sum of its proper divisors (54043).

121525541 is an equidigital number, since it uses as much as digits as its factorization.

121525541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54042.

The product of its digits is 2000, while the sum is 26.

The square root of 121525541 is about 11023.8623449316. The cubic root of 121525541 is about 495.3237904680.

The spelling of 121525541 in words is "one hundred twenty-one million, five hundred twenty-five thousand, five hundred forty-one".