345528121 has 2 divisors, whose sum is σ = 345528122. Its totient is φ = 345528120.

The previous prime is 345528119. The next prime is 345528143. The reversal of 345528121 is 121825543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318122896 + 27405225 = 17836^2 + 5235^2 .

It is a cyclic number.

It is not a de Polignac number, because 345528121 - 2¹ = 345528119 is a prime.

Together with 345528119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345528101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172764060 + 172764061.

It is an arithmetic number, because the mean of its divisors is an integer number (172764061).

Almost surely, 2^345528121 is an apocalyptic number.

It is an amenable number.

345528121 is a deficient number, since it is larger than the sum of its proper divisors (1).

345528121 is an equidigital number, since it uses as much as digits as its factorization.

345528121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 345528121 is about 18588.3867239737. The cubic root of 345528121 is about 701.7156020684.

The spelling of 345528121 in words is "three hundred forty-five million, five hundred twenty-eight thousand, one hundred twenty-one".