345122161 has 2 divisors, whose sum is σ = 345122162. Its totient is φ = 345122160.

The previous prime is 345122147. The next prime is 345122177. The reversal of 345122161 is 161221543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187142400 + 157979761 = 13680^2 + 12569^2 .

It is a cyclic number.

It is not a de Polignac number, because 345122161 - 2⁹ = 345121649 is a prime.

It is not a weakly prime, because it can be changed into another prime (345122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172561080 + 172561081.

It is an arithmetic number, because the mean of its divisors is an integer number (172561081).

Almost surely, 2^345122161 is an apocalyptic number.

It is an amenable number.

345122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

345122161 is an equidigital number, since it uses as much as digits as its factorization.

345122161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 345122161 is about 18577.4637935322. The cubic root of 345122161 is about 701.4406798213.

The spelling of 345122161 in words is "three hundred forty-five million, one hundred twenty-two thousand, one hundred sixty-one".