121426380 has 144 divisors (see below), whose sum is σ = 389136384. Its totient is φ = 30602880.

The previous prime is 121426373. The next prime is 121426381. The reversal of 121426380 is 83624121.

121426380 is a `hidden beast` number, since 1 + 21 + 4 + 2 + 638 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (121426381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262029 + ... + 262491.

It is an arithmetic number, because the mean of its divisors is an integer number (2702336).

Almost surely, 2^121426380 is an apocalyptic number.

121426380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121426380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194568192).

121426380 is an abundant number, since it is smaller than the sum of its proper divisors (267710004).

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

121426380 is a wasteful number, since it uses less digits than its factorization.

121426380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 121426380 is about 11019.3638654870. The cubic root of 121426380 is about 495.1890309563.

The spelling of 121426380 in words is "one hundred twenty-one million, four hundred twenty-six thousand, three hundred eighty".