345124561 has 2 divisors, whose sum is σ = 345124562. Its totient is φ = 345124560.

The previous prime is 345124553. The next prime is 345124573. The reversal of 345124561 is 165421543.

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., 329640336 + 15484225 = 18156^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 345124561 - 2³ = 345124553 is a prime.

It is a super-2 number, since 2×345124561² = 238221925210885442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345124501) by changing a digit.

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 as a sum of consecutive naturals, namely, 172562280 + 172562281.

It is an arithmetic number, because the mean of its divisors is an integer number (172562281).

Almost surely, 2^345124561 is an apocalyptic number.

It is an amenable number.

345124561 is a deficient number, since it is larger than the sum of its proper divisors (1).

345124561 is an equidigital number, since it uses as much as digits as its factorization.

345124561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 345124561 is about 18577.5283878131. The cubic root of 345124561 is about 701.4423057709.

The spelling of 345124561 in words is "three hundred forty-five million, one hundred twenty-four thousand, five hundred sixty-one".