121443345 has 24 divisors (see below), whose sum is σ = 221582400. Its totient is φ = 61360416.

The previous prime is 121443341. The next prime is 121443389. The reversal of 121443345 is 543344121.

It is a happy number.

It is not a de Polignac number, because 121443345 - 2² = 121443341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121443341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70165 + ... + 71874.

It is an arithmetic number, because the mean of its divisors is an integer number (9232600).

Almost surely, 2^121443345 is an apocalyptic number.

121443345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121443345 is a deficient number, since it is larger than the sum of its proper divisors (100139055).

121443345 is a wasteful number, since it uses less digits than its factorization.

121443345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142069 (or 142066 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 121443345 is about 11020.1336198796. The cubic root of 121443345 is about 495.2120915430.

Adding to 121443345 its reverse (543344121), we get a palindrome (664787466).

The spelling of 121443345 in words is "one hundred twenty-one million, four hundred forty-three thousand, three hundred forty-five".