121683456 has 60 divisors (see below), whose sum is σ = 351199992. Its totient is φ = 40559616.

The previous prime is 121683451. The next prime is 121683473. The reversal of 121683456 is 654386121.

It is a happy number.

121683456 is a `hidden beast` number, since 121 + 6 + 83 + 456 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 121683456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121683451) 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, 8596 + ... + 17811.

Almost surely, 2^121683456 is an apocalyptic number.

121683456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121683456 is an abundant number, since it is smaller than the sum of its proper divisors (229516536).

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

121683456 is an equidigital number, since it uses as much as digits as its factorization.

121683456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26431 (or 26412 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 121683456 is about 11031.0224367463. The cubic root of 121683456 is about 495.5382452508.

The spelling of 121683456 in words is "one hundred twenty-one million, six hundred eighty-three thousand, four hundred fifty-six".