121523541 has 16 divisors (see below), whose sum is σ = 165559680. Its totient is φ = 79260480.

The previous prime is 121523491. The next prime is 121523569. The reversal of 121523541 is 145325121.

It is a happy number.

It is not a de Polignac number, because 121523541 - 2¹⁰ = 121522517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121523641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68931 + ... + 70671.

It is an arithmetic number, because the mean of its divisors is an integer number (10347480).

Almost surely, 2^121523541 is an apocalyptic number.

It is an amenable number.

121523541 is a deficient number, since it is larger than the sum of its proper divisors (44036139).

121523541 is a wasteful number, since it uses less digits than its factorization.

121523541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236.

The product of its digits is 1200, while the sum is 24.

The square root of 121523541 is about 11023.7716322500. The cubic root of 121523541 is about 495.3210731983.

Adding to 121523541 its reverse (145325121), we get a palindrome (266848662).

The spelling of 121523541 in words is "one hundred twenty-one million, five hundred twenty-three thousand, five hundred forty-one".