121415541 has 16 divisors (see below), whose sum is σ = 174625920. Its totient is φ = 74594880.

The previous prime is 121415533. The next prime is 121415557. The reversal of 121415541 is 145514121.

It is not a de Polignac number, because 121415541 - 2³ = 121415533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121415741) 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 15 ways as a sum of consecutive naturals, for example, 25456 + ... + 29846.

It is an arithmetic number, because the mean of its divisors is an integer number (10914120).

Almost surely, 2^121415541 is an apocalyptic number.

It is an amenable number.

121415541 is a deficient number, since it is larger than the sum of its proper divisors (53210379).

121415541 is a wasteful number, since it uses less digits than its factorization.

121415541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116.

The product of its digits is 800, while the sum is 24.

The square root of 121415541 is about 11018.8720384620. The cubic root of 121415541 is about 495.1742963392.

Adding to 121415541 its reverse (145514121), we get a palindrome (266929662).

The spelling of 121415541 in words is "one hundred twenty-one million, four hundred fifteen thousand, five hundred forty-one".