121904361 has 12 divisors (see below), whose sum is σ = 185351920. Its totient is φ = 76992120.

The previous prime is 121904359. The next prime is 121904389. The reversal of 121904361 is 163409121.

It is not a de Polignac number, because 121904361 - 2¹ = 121904359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121904261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356275 + ... + 356616.

Almost surely, 2^121904361 is an apocalyptic number.

It is an amenable number.

121904361 is a deficient number, since it is larger than the sum of its proper divisors (63447559).

121904361 is a wasteful number, since it uses less digits than its factorization.

121904361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712916 (or 712913 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 121904361 is about 11041.0307942692. The cubic root of 121904361 is about 495.8379318423.

It can be divided in two parts, 121904 and 361, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 121904361 in words is "one hundred twenty-one million, nine hundred four thousand, three hundred sixty-one".