405049 has 2 divisors, whose sum is σ = 405050. Its totient is φ = 405048.

The previous prime is 405047. The next prime is 405071. The reversal of 405049 is 940504.

It is an a-pointer prime, because the next prime (405071) can be obtained adding 405049 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399424 + 5625 = 632^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 405049 - 2¹ = 405047 is a prime.

Together with 405047, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202524 + 202525.

It is an arithmetic number, because the mean of its divisors is an integer number (202525).

2⁴⁰⁵⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

405049 is a deficient number, since it is larger than the sum of its proper divisors (1).

405049 is an equidigital number, since it uses as much as digits as its factorization.

405049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 405049 is about 636.4345999394. The cubic root of 405049 is about 73.9893459217.

Adding to 405049 its product of nonzero digits (720), we get a square (405769 = 637²).

The spelling of 405049 in words is "four hundred five thousand, forty-nine".