121256245 has 8 divisors (see below), whose sum is σ = 158735520. Its totient is φ = 88186320.

The previous prime is 121256243. The next prime is 121256251. The reversal of 121256245 is 542652121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121256245 - 2¹ = 121256243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121256243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102275 + ... + 1102384.

It is an arithmetic number, because the mean of its divisors is an integer number (19841940).

Almost surely, 2^121256245 is an apocalyptic number.

It is an amenable number.

121256245 is a deficient number, since it is larger than the sum of its proper divisors (37479275).

121256245 is a wasteful number, since it uses less digits than its factorization.

121256245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204675.

The product of its digits is 4800, while the sum is 28.

The square root of 121256245 is about 11011.6413399638. The cubic root of 121256245 is about 494.9576469562.

The spelling of 121256245 in words is "one hundred twenty-one million, two hundred fifty-six thousand, two hundred forty-five".