345027521 has 2 divisors, whose sum is σ = 345027522. Its totient is φ = 345027520.

The previous prime is 345027503. The next prime is 345027541. The reversal of 345027521 is 125720543.

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., 325983025 + 19044496 = 18055^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 345027521 - 2¹⁴ = 345011137 is a prime.

It is not a weakly prime, because it can be changed into another prime (345027541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172513760 + 172513761.

It is an arithmetic number, because the mean of its divisors is an integer number (172513761).

Almost surely, 2^345027521 is an apocalyptic number.

It is an amenable number.

345027521 is a deficient number, since it is larger than the sum of its proper divisors (1).

345027521 is an equidigital number, since it uses as much as digits as its factorization.

345027521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 345027521 is about 18574.9164466492. The cubic root of 345027521 is about 701.3765571981.

The spelling of 345027521 in words is "three hundred forty-five million, twenty-seven thousand, five hundred twenty-one".