121286747 has 8 divisors (see below), whose sum is σ = 128865600. Its totient is φ = 113827464.

The previous prime is 121286741. The next prime is 121286749. The reversal of 121286747 is 747682121.

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

It is a cyclic number.

It is not a de Polignac number, because 121286747 - 2⁴ = 121286731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121286747.

It is not an unprimeable number, because it can be changed into a prime (121286741) 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, 27797 + ... + 31862.

It is an arithmetic number, because the mean of its divisors is an integer number (16108200).

Almost surely, 2^121286747 is an apocalyptic number.

121286747 is a deficient number, since it is larger than the sum of its proper divisors (7578853).

121286747 is a wasteful number, since it uses less digits than its factorization.

121286747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59785.

The product of its digits is 37632, while the sum is 38.

The square root of 121286747 is about 11013.0262416831. The cubic root of 121286747 is about 494.9991456639. Note that the first 3 decimals are identical.

The spelling of 121286747 in words is "one hundred twenty-one million, two hundred eighty-six thousand, seven hundred forty-seven".