121785394 has 8 divisors (see below), whose sum is σ = 182725740. Its totient is φ = 60876816.

The previous prime is 121785359. The next prime is 121785401. The reversal of 121785394 is 493587121.

It can be written as a sum of positive squares in 2 ways, for example, as 120714169 + 1071225 = 10987^2 + 1035^2 .

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

It is an unprimeable number.

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, 8232 + ... + 17644.

Almost surely, 2^121785394 is an apocalyptic number.

121785394 is a deficient number, since it is larger than the sum of its proper divisors (60940346).

121785394 is an equidigital number, since it uses as much as digits as its factorization.

121785394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884.

The product of its digits is 60480, while the sum is 40.

The square root of 121785394 is about 11035.6419840442. The cubic root of 121785394 is about 495.6765825403.

The spelling of 121785394 in words is "one hundred twenty-one million, seven hundred eighty-five thousand, three hundred ninety-four".