121260605 has 4 divisors (see below), whose sum is σ = 145512732. Its totient is φ = 97008480.

The previous prime is 121260599. The next prime is 121260617. The reversal of 121260605 is 506062121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506062121 = 563 ⋅898867.

It can be written as a sum of positive squares in 2 ways, for example, as 57851236 + 63409369 = 7606^2 + 7963^2 .

It is not a de Polignac number, because 121260605 - 2¹⁰ = 121259581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12126056 + ... + 12126065.

It is an arithmetic number, because the mean of its divisors is an integer number (36378183).

Almost surely, 2^121260605 is an apocalyptic number.

It is an amenable number.

121260605 is a deficient number, since it is larger than the sum of its proper divisors (24252127).

121260605 is an equidigital number, since it uses as much as digits as its factorization.

121260605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24252126.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121260605 is about 11011.8393104876. The cubic root of 121260605 is about 494.9635792677.

It can be divided in two parts, 1212 and 60605, that multiplied together give a triangular number (73453260 = T₁₂₁₂₀).

The spelling of 121260605 in words is "one hundred twenty-one million, two hundred sixty thousand, six hundred five".