121266656 has 24 divisors (see below), whose sum is σ = 272850480. Its totient is φ = 51971328.

The previous prime is 121266647. The next prime is 121266667. The reversal of 121266656 is 656662121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270461 + ... + 270908.

It is an arithmetic number, because the mean of its divisors is an integer number (11368770).

Almost surely, 2^121266656 is an apocalyptic number.

121266656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121266656 is an abundant number, since it is smaller than the sum of its proper divisors (151583824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121266656 is an equidigital number, since it uses as much as digits as its factorization.

121266656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541386 (or 541378 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 121266656 is about 11012.1140568013. The cubic root of 121266656 is about 494.9718121554.

The spelling of 121266656 in words is "one hundred twenty-one million, two hundred sixty-six thousand, six hundred fifty-six".