121655345 has 16 divisors (see below), whose sum is σ = 169672320. Its totient is φ = 82005504.

The previous prime is 121655333. The next prime is 121655357. The reversal of 121655345 is 543556121.

It is an interprime number because it is at equal distance from previous prime (121655333) and next prime (121655357).

It is not a de Polignac number, because 121655345 - 2⁴ = 121655329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27392 + ... + 31521.

It is an arithmetic number, because the mean of its divisors is an integer number (10604520).

Almost surely, 2^121655345 is an apocalyptic number.

It is an amenable number.

121655345 is a deficient number, since it is larger than the sum of its proper divisors (48016975).

121655345 is an equidigital number, since it uses as much as digits as its factorization.

121655345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58984.

The product of its digits is 18000, while the sum is 32.

The square root of 121655345 is about 11029.7481838889. The cubic root of 121655345 is about 495.5000829870.

The spelling of 121655345 in words is "one hundred twenty-one million, six hundred fifty-five thousand, three hundred forty-five".