405306641 has 2 divisors, whose sum is σ = 405306642. Its totient is φ = 405306640.

The previous prime is 405306611. The next prime is 405306653. The reversal of 405306641 is 146603504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323856016 + 81450625 = 17996^2 + 9025^2 .

It is a cyclic number.

It is not a de Polignac number, because 405306641 - 2¹⁴ = 405290257 is a prime.

It is not a weakly prime, because it can be changed into another prime (405306611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202653320 + 202653321.

It is an arithmetic number, because the mean of its divisors is an integer number (202653321).

Almost surely, 2^405306641 is an apocalyptic number.

It is an amenable number.

405306641 is a deficient number, since it is larger than the sum of its proper divisors (1).

405306641 is an equidigital number, since it uses as much as digits as its factorization.

405306641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 405306641 is about 20132.2289128651. The cubic root of 405306641 is about 740.0503015478.

The spelling of 405306641 in words is "four hundred five million, three hundred six thousand, six hundred forty-one".