121534749 has 72 divisors (see below), whose sum is σ = 216609120. Its totient is φ = 67876704.

The previous prime is 121534729. The next prime is 121534769. The reversal of 121534749 is 947435121.

It is an interprime number because it is at equal distance from previous prime (121534729) and next prime (121534769).

It is not a de Polignac number, because 121534749 - 2¹¹ = 121532701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121534729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 702427 + ... + 702599.

It is an arithmetic number, because the mean of its divisors is an integer number (3008460).

Almost surely, 2^121534749 is an apocalyptic number.

It is an amenable number.

121534749 is a deficient number, since it is larger than the sum of its proper divisors (95074371).

121534749 is an equidigital number, since it uses as much as digits as its factorization.

121534749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 242 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 121534749 is about 11024.2799764883. The cubic root of 121534749 is about 495.3363003932.

The spelling of 121534749 in words is "one hundred twenty-one million, five hundred thirty-four thousand, seven hundred forty-nine".