121426389 has 24 divisors (see below), whose sum is σ = 201993792. Its totient is φ = 68852160.

The previous prime is 121426387. The next prime is 121426421. The reversal of 121426389 is 983624121.

121426389 is a `hidden beast` number, since 1 + 2 + 14 + 2 + 638 + 9 = 666.

It is not a de Polignac number, because 121426389 - 2¹ = 121426387 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 897 + ... + 15609.

It is an arithmetic number, because the mean of its divisors is an integer number (8416408).

Almost surely, 2^121426389 is an apocalyptic number.

It is an amenable number.

121426389 is a deficient number, since it is larger than the sum of its proper divisors (80567403).

121426389 is a wasteful number, since it uses less digits than its factorization.

121426389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14857 (or 14854 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 121426389 is about 11019.3642738590. The cubic root of 121426389 is about 495.1890431906.

The spelling of 121426389 in words is "one hundred twenty-one million, four hundred twenty-six thousand, three hundred eighty-nine".