405342361 has 2 divisors, whose sum is σ = 405342362. Its totient is φ = 405342360.

The previous prime is 405342347. The next prime is 405342433. The reversal of 405342361 is 163243504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324000000 + 81342361 = 18000^2 + 9019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405342361 is a prime.

It is not a weakly prime, because it can be changed into another prime (405342341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202671180 + 202671181.

It is an arithmetic number, because the mean of its divisors is an integer number (202671181).

Almost surely, 2^405342361 is an apocalyptic number.

It is an amenable number.

405342361 is a deficient number, since it is larger than the sum of its proper divisors (1).

405342361 is an equidigital number, since it uses as much as digits as its factorization.

405342361 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 28.

The square root of 405342361 is about 20133.1160280767. The cubic root of 405342361 is about 740.0720413184.

Adding to 405342361 its reverse (163243504), we get a palindrome (568585865).

The spelling of 405342361 in words is "four hundred five million, three hundred forty-two thousand, three hundred sixty-one".