121654361 has 4 divisors (see below), whose sum is σ = 121692900. Its totient is φ = 121615824.

The previous prime is 121654327. The next prime is 121654373. The reversal of 121654361 is 163456121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64561225 + 57093136 = 8035^2 + 7556^2 .

It is a cyclic number.

It is not a de Polignac number, because 121654361 - 2¹⁸ = 121392217 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121654661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14066 + ... + 21003.

It is an arithmetic number, because the mean of its divisors is an integer number (30423225).

Almost surely, 2^121654361 is an apocalyptic number.

It is an amenable number.

121654361 is a deficient number, since it is larger than the sum of its proper divisors (38539).

121654361 is an equidigital number, since it uses as much as digits as its factorization.

121654361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38538.

The product of its digits is 4320, while the sum is 29.

The square root of 121654361 is about 11029.7035771593. The cubic root of 121654361 is about 495.4987470452.

The spelling of 121654361 in words is "one hundred twenty-one million, six hundred fifty-four thousand, three hundred sixty-one".