121243256 has 32 divisors (see below), whose sum is σ = 240570000. Its totient is φ = 57125376.

The previous prime is 121243249. The next prime is 121243259. The reversal of 121243256 is 652342121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27920 + ... + 31968.

Almost surely, 2^121243256 is an apocalyptic number.

It is an amenable number.

121243256 is a deficient number, since it is larger than the sum of its proper divisors (119326744).

121243256 is a wasteful number, since it uses less digits than its factorization.

121243256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271 (or 4267 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 121243256 is about 11011.0515392491. The cubic root of 121243256 is about 494.9399729951.

Adding to 121243256 its reverse (652342121), we get a palindrome (773585377).

The spelling of 121243256 in words is "one hundred twenty-one million, two hundred forty-three thousand, two hundred fifty-six".