121605443 has 2 divisors, whose sum is σ = 121605444. Its totient is φ = 121605442.

The previous prime is 121605427. The next prime is 121605457. The reversal of 121605443 is 344506121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121605443 - 2⁴ = 121605427 is a prime.

It is not a weakly prime, because it can be changed into another prime (121605413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60802721 + 60802722.

It is an arithmetic number, because the mean of its divisors is an integer number (60802722).

Almost surely, 2^121605443 is an apocalyptic number.

121605443 is a deficient number, since it is larger than the sum of its proper divisors (1).

121605443 is an equidigital number, since it uses as much as digits as its factorization.

121605443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 121605443 is about 11027.4857968623. The cubic root of 121605443 is about 495.4323237316.

The spelling of 121605443 in words is "one hundred twenty-one million, six hundred five thousand, four hundred forty-three".