121604401 has 4 divisors (see below), whose sum is σ = 124570404. Its totient is φ = 118638400.

The previous prime is 121604363. The next prime is 121604411. The reversal of 121604401 is 104406121.

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 49014001 + 72590400 = 7001^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 121604401 - 2¹¹ = 121602353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121604411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482940 + ... + 1483021.

It is an arithmetic number, because the mean of its divisors is an integer number (31142601).

Almost surely, 2^121604401 is an apocalyptic number.

It is an amenable number.

121604401 is a deficient number, since it is larger than the sum of its proper divisors (2966003).

121604401 is an equidigital number, since it uses as much as digits as its factorization.

121604401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966002.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121604401 is about 11027.4385511777. The cubic root of 121604401 is about 495.4309086580.

It can be divided in two parts, 12160 and 4401, that added together give a palindrome (16561).

The spelling of 121604401 in words is "one hundred twenty-one million, six hundred four thousand, four hundred one".