121280915 has 16 divisors (see below), whose sum is σ = 169869312. Its totient is φ = 81393504.

The previous prime is 121280893. The next prime is 121280917. The reversal of 121280915 is 519082121.

It is a cyclic number.

It is not a de Polignac number, because 121280915 - 2¹² = 121276819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121280917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35219 + ... + 38508.

It is an arithmetic number, because the mean of its divisors is an integer number (10616832).

Almost surely, 2^121280915 is an apocalyptic number.

121280915 is a deficient number, since it is larger than the sum of its proper divisors (48588397).

121280915 is an equidigital number, since it uses as much as digits as its factorization.

121280915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73786.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 121280915 is about 11012.7614611413. The cubic root of 121280915 is about 494.9912116251.

The spelling of 121280915 in words is "one hundred twenty-one million, two hundred eighty thousand, nine hundred fifteen".