121649017 has 12 divisors (see below), whose sum is σ = 141696756. Its totient is φ = 104133120.

The previous prime is 121648999. The next prime is 121649029. The reversal of 121649017 is 710946121.

It can be written as a sum of positive squares in 2 ways, for example, as 54228496 + 67420521 = 7364^2 + 8211^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121649017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121649017.

It is not an unprimeable number, because it can be changed into a prime (121649117) 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, 57417 + ... + 59497.

It is an arithmetic number, because the mean of its divisors is an integer number (11808063).

Almost surely, 2^121649017 is an apocalyptic number.

It is an amenable number.

121649017 is a deficient number, since it is larger than the sum of its proper divisors (20047739).

121649017 is a wasteful number, since it uses less digits than its factorization.

121649017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288 (or 3281 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 121649017 is about 11029.4613195750. The cubic root of 121649017 is about 495.4914915605.

The spelling of 121649017 in words is "one hundred twenty-one million, six hundred forty-nine thousand, seventeen".