121431384 has 24 divisors (see below), whose sum is σ = 328876860. Its totient is φ = 40477104.

The previous prime is 121431383. The next prime is 121431461. The reversal of 121431384 is 483134121.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 843202 + ... + 843345.

Almost surely, 2^121431384 is an apocalyptic number.

It is an amenable number.

121431384 is an abundant number, since it is smaller than the sum of its proper divisors (207445476).

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

121431384 is a wasteful number, since it uses less digits than its factorization.

121431384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686559 (or 1686552 counting only the distinct ones).

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

The square root of 121431384 is about 11019.5909179969. The cubic root of 121431384 is about 495.1958331352.

The spelling of 121431384 in words is "one hundred twenty-one million, four hundred thirty-one thousand, three hundred eighty-four".