121543445 has 16 divisors (see below), whose sum is σ = 147744768. Its totient is φ = 95981760.

The previous prime is 121543441. The next prime is 121543453. The reversal of 121543445 is 544345121.

It is not a de Polignac number, because 121543445 - 2² = 121543441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543441) 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, 175550 + ... + 176240.

It is an arithmetic number, because the mean of its divisors is an integer number (9234048).

Almost surely, 2^121543445 is an apocalyptic number.

It is an amenable number.

121543445 is a deficient number, since it is larger than the sum of its proper divisors (26201323).

121543445 is a wasteful number, since it uses less digits than its factorization.

121543445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its digits is 9600, while the sum is 29.

The square root of 121543445 is about 11024.6743716084. The cubic root of 121543445 is about 495.3481141385.

Adding to 121543445 its reverse (544345121), we get a palindrome (665888566).

The spelling of 121543445 in words is "one hundred twenty-one million, five hundred forty-three thousand, four hundred forty-five".