121233745 has 16 divisors (see below), whose sum is σ = 147566160. Its totient is φ = 95606784.

The previous prime is 121233743. The next prime is 121233751. The reversal of 121233745 is 547332121.

It can be written as a sum of positive squares in 8 ways, for example, as 19607184 + 101626561 = 4428^2 + 10081^2 .

It is a cyclic number.

It is not a de Polignac number, because 121233745 - 2¹ = 121233743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121233743) 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, 128917 + ... + 129853.

It is an arithmetic number, because the mean of its divisors is an integer number (9222885).

Almost surely, 2^121233745 is an apocalyptic number.

It is an amenable number.

121233745 is a deficient number, since it is larger than the sum of its proper divisors (26332415).

121233745 is a wasteful number, since it uses less digits than its factorization.

121233745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284.

The product of its digits is 5040, while the sum is 28.

The square root of 121233745 is about 11010.6196465049. The cubic root of 121233745 is about 494.9270307023.

Adding to 121233745 its reverse (547332121), we get a palindrome (668565866).

The spelling of 121233745 in words is "one hundred twenty-one million, two hundred thirty-three thousand, seven hundred forty-five".