121256343 has 24 divisors (see below), whose sum is σ = 189418320. Its totient is φ = 74304000.

The previous prime is 121256341. The next prime is 121256353. The reversal of 121256343 is 343652121.

121256343 is a `hidden beast` number, since 1 + 2 + 1 + 25 + 634 + 3 = 666.

It is not a de Polignac number, because 121256343 - 2¹ = 121256341 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121256341) 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, 27303 + ... + 31431.

It is an arithmetic number, because the mean of its divisors is an integer number (7892430).

Almost surely, 2^121256343 is an apocalyptic number.

121256343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121256343 is a deficient number, since it is larger than the sum of its proper divisors (68161977).

121256343 is a wasteful number, since it uses less digits than its factorization.

121256343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399 (or 4396 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 121256343 is about 11011.6457897991. The cubic root of 121256343 is about 494.9577802987.

The spelling of 121256343 in words is "one hundred twenty-one million, two hundred fifty-six thousand, three hundred forty-three".