121499739 has 12 divisors (see below), whose sum is σ = 178377472. Its totient is φ = 79671600.

The previous prime is 121499723. The next prime is 121499753. The reversal of 121499739 is 937994121.

121499739 is a `hidden beast` number, since 121 + 499 + 7 + 39 = 666.

It is not a de Polignac number, because 121499739 - 2⁴ = 121499723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121499694 and 121499703.

It is not an unprimeable number, because it can be changed into a prime (121499779) 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 11 ways as a sum of consecutive naturals, for example, 110107 + ... + 111204.

Almost surely, 2^121499739 is an apocalyptic number.

121499739 is a deficient number, since it is larger than the sum of its proper divisors (56877733).

121499739 is a wasteful number, since it uses less digits than its factorization.

121499739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221378 (or 221375 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 121499739 is about 11022.6920033175. The cubic root of 121499739 is about 495.2887326825.

The spelling of 121499739 in words is "one hundred twenty-one million, four hundred ninety-nine thousand, seven hundred thirty-nine".