121764418 has 8 divisors (see below), whose sum is σ = 185641020. Its totient is φ = 59884080.

The previous prime is 121764413. The next prime is 121764427. The reversal of 121764418 is 814467121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99740169 + 22024249 = 9987^2 + 4693^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121764413) 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 3 ways as a sum of consecutive naturals, for example, 498913 + ... + 499156.

Almost surely, 2^121764418 is an apocalyptic number.

121764418 is a deficient number, since it is larger than the sum of its proper divisors (63876602).

121764418 is an equidigital number, since it uses as much as digits as its factorization.

121764418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998132.

The product of its digits is 10752, while the sum is 34.

The square root of 121764418 is about 11034.6915679597. The cubic root of 121764418 is about 495.6481228906.

The spelling of 121764418 in words is "one hundred twenty-one million, seven hundred sixty-four thousand, four hundred eighteen".