121732749 has 12 divisors (see below), whose sum is σ = 181899900. Its totient is φ = 78356544.

The previous prime is 121732747. The next prime is 121732763. The reversal of 121732749 is 947237121.

It can be written as a sum of positive squares in 2 ways, for example, as 73874025 + 47858724 = 8595^2 + 6918^2 .

It is not a de Polignac number, because 121732749 - 2¹ = 121732747 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121732747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232944 + ... + 233465.

It is an arithmetic number, because the mean of its divisors is an integer number (15158325).

Almost surely, 2^121732749 is an apocalyptic number.

It is an amenable number.

121732749 is a deficient number, since it is larger than the sum of its proper divisors (60167151).

121732749 is a wasteful number, since it uses less digits than its factorization.

121732749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466444 (or 466441 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 121732749 is about 11033.2565002360. The cubic root of 121732749 is about 495.6051490846.

The spelling of 121732749 in words is "one hundred twenty-one million, seven hundred thirty-two thousand, seven hundred forty-nine".