121738401 has 6 divisors (see below), whose sum is σ = 175844370. Its totient is φ = 81158928.

The previous prime is 121738391. The next prime is 121738451. The reversal of 121738401 is 104837121.

It can be written as a sum of positive squares in only one way, i.e., 76580001 + 45158400 = 8751^2 + 6720^2 .

It is not a de Polignac number, because 121738401 - 2⁵ = 121738369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121738451) 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 5 ways as a sum of consecutive naturals, for example, 6763236 + ... + 6763253.

It is an arithmetic number, because the mean of its divisors is an integer number (29307395).

Almost surely, 2^121738401 is an apocalyptic number.

It is an amenable number.

121738401 is a deficient number, since it is larger than the sum of its proper divisors (54105969).

121738401 is a wasteful number, since it uses less digits than its factorization.

121738401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13526495 (or 13526492 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 121738401 is about 11033.5126319772. The cubic root of 121738401 is about 495.6128192116.

The spelling of 121738401 in words is "one hundred twenty-one million, seven hundred thirty-eight thousand, four hundred one".