121432541 has 4 divisors (see below), whose sum is σ = 125619900. Its totient is φ = 117245184.

The previous prime is 121432469. The next prime is 121432543. The reversal of 121432541 is 145234121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89226916 + 32205625 = 9446^2 + 5675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121432541 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432543) 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, 2093636 + ... + 2093693.

It is an arithmetic number, because the mean of its divisors is an integer number (31404975).

Almost surely, 2^121432541 is an apocalyptic number.

It is an amenable number.

121432541 is a deficient number, since it is larger than the sum of its proper divisors (4187359).

121432541 is an equidigital number, since it uses as much as digits as its factorization.

121432541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187358.

The product of its digits is 960, while the sum is 23.

The square root of 121432541 is about 11019.6434152835. The cubic root of 121432541 is about 495.1974058745.

Adding to 121432541 its reverse (145234121), we get a palindrome (266666662).

The spelling of 121432541 in words is "one hundred twenty-one million, four hundred thirty-two thousand, five hundred forty-one".