121766265 has 24 divisors (see below), whose sum is σ = 214643520. Its totient is φ = 63839904.

The previous prime is 121766243. The next prime is 121766287. The reversal of 121766265 is 562667121.

It is a happy number.

121766265 is a `hidden beast` number, since 1 + 21 + 7 + 6 + 626 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (121766243) and next prime (121766287).

It is not a de Polignac number, because 121766265 - 2¹⁸ = 121504121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20277 + ... + 25586.

It is an arithmetic number, because the mean of its divisors is an integer number (8943480).

Almost surely, 2^121766265 is an apocalyptic number.

121766265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121766265 is a deficient number, since it is larger than the sum of its proper divisors (92877255).

121766265 is a wasteful number, since it uses less digits than its factorization.

121766265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45933 (or 45930 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 121766265 is about 11034.7752582461. The cubic root of 121766265 is about 495.6506289797.

The spelling of 121766265 in words is "one hundred twenty-one million, seven hundred sixty-six thousand, two hundred sixty-five".