121245144 has 32 divisors (see below), whose sum is σ = 316293120. Its totient is φ = 38657696.

The previous prime is 121245127. The next prime is 121245149. The reversal of 121245144 is 441542121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121245149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109272 + ... + 110375.

It is an arithmetic number, because the mean of its divisors is an integer number (9884160).

Almost surely, 2^121245144 is an apocalyptic number.

It is an amenable number.

121245144 is an abundant number, since it is smaller than the sum of its proper divisors (195047976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121245144 is a wasteful number, since it uses less digits than its factorization.

121245144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219679 (or 219675 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 121245144 is about 11011.1372709634. The cubic root of 121245144 is about 494.9425420502.

Adding to 121245144 its reverse (441542121), we get a palindrome (562787265).

The spelling of 121245144 in words is "one hundred twenty-one million, two hundred forty-five thousand, one hundred forty-four".