121378446 has 64 divisors (see below), whose sum is σ = 311247360. Its totient is φ = 34344000.

The previous prime is 121378421. The next prime is 121378451. The reversal of 121378446 is 644873121.

It is a self number, because there is not a number n which added to its sum of digits gives 121378446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38946 + ... + 41946.

It is an arithmetic number, because the mean of its divisors is an integer number (4863240).

Almost surely, 2^121378446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121378446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155623680).

121378446 is an abundant number, since it is smaller than the sum of its proper divisors (189868914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121378446 is a wasteful number, since it uses less digits than its factorization.

121378446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126 (or 3120 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 121378446 is about 11017.1886613600. The cubic root of 121378446 is about 495.1238624839.

The spelling of 121378446 in words is "one hundred twenty-one million, three hundred seventy-eight thousand, four hundred forty-six".