121362409 has 8 divisors (see below), whose sum is σ = 139713408. Its totient is φ = 103264800.

The previous prime is 121362401. The next prime is 121362433. The reversal of 121362409 is 904263121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121362409 - 2³ = 121362401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121362401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62317 + ... + 64234.

It is an arithmetic number, because the mean of its divisors is an integer number (17464176).

Almost surely, 2^121362409 is an apocalyptic number.

It is an amenable number.

121362409 is a deficient number, since it is larger than the sum of its proper divisors (18350999).

121362409 is a wasteful number, since it uses less digits than its factorization.

121362409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126695.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 121362409 is about 11016.4608200638. The cubic root of 121362409 is about 495.1020556163.

It can be divided in two parts, 121362 and 409, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 121362409 in words is "one hundred twenty-one million, three hundred sixty-two thousand, four hundred nine".