121590649 has 16 divisors (see below), whose sum is σ = 130659840. Its totient is φ = 112896000.

The previous prime is 121590641. The next prime is 121590661. The reversal of 121590649 is 946095121.

It is a cyclic number.

It is not a de Polignac number, because 121590649 - 2³ = 121590641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121590641) 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, 189369 + ... + 190009.

It is an arithmetic number, because the mean of its divisors is an integer number (8166240).

Almost surely, 2^121590649 is an apocalyptic number.

It is an amenable number.

121590649 is a deficient number, since it is larger than the sum of its proper divisors (9069191).

121590649 is a wasteful number, since it uses less digits than its factorization.

121590649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 121590649 is about 11026.8149979947. The cubic root of 121590649 is about 495.4122321884.

The spelling of 121590649 in words is "one hundred twenty-one million, five hundred ninety thousand, six hundred forty-nine".