121244789 has 4 divisors (see below), whose sum is σ = 122607180. Its totient is φ = 119882400.

The previous prime is 121244777. The next prime is 121244807. The reversal of 121244789 is 987442121.

It is a happy number.

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 30195025 + 91049764 = 5495^2 + 9542^2 .

It is a cyclic number.

It is not a de Polignac number, because 121244789 - 2⁸ = 121244533 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 (121241789) 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, 681062 + ... + 681239.

It is an arithmetic number, because the mean of its divisors is an integer number (30651795).

Almost surely, 2^121244789 is an apocalyptic number.

It is an amenable number.

121244789 is a deficient number, since it is larger than the sum of its proper divisors (1362391).

121244789 is an equidigital number, since it uses as much as digits as its factorization.

121244789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362390.

The product of its digits is 32256, while the sum is 38.

The square root of 121244789 is about 11011.1211509092. The cubic root of 121244789 is about 494.9420589937.

The spelling of 121244789 in words is "one hundred twenty-one million, two hundred forty-four thousand, seven hundred eighty-nine".