121254378 has 16 divisors (see below), whose sum is σ = 277152960. Its totient is φ = 34644096.

The previous prime is 121254377. The next prime is 121254383. The reversal of 121254378 is 873452121.

It is not an unprimeable number, because it can be changed into a prime (121254377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443463 + ... + 1443546.

It is an arithmetic number, because the mean of its divisors is an integer number (17322060).

Almost surely, 2^121254378 is an apocalyptic number.

121254378 is an abundant number, since it is smaller than the sum of its proper divisors (155898582).

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

121254378 is a wasteful number, since it uses less digits than its factorization.

121254378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887021.

The product of its digits is 13440, while the sum is 33.

The square root of 121254378 is about 11011.5565657177. The cubic root of 121254378 is about 494.9551066316.

The spelling of 121254378 in words is "one hundred twenty-one million, two hundred fifty-four thousand, three hundred seventy-eight".