405269 has 2 divisors, whose sum is σ = 405270. Its totient is φ = 405268.

The previous prime is 405253. The next prime is 405277. The reversal of 405269 is 962504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237169 + 168100 = 487^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 405269 - 2⁴ = 405253 is a prime.

It is a super-3 number, since 3×405269³ = 199687743339240327, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202634 + 202635.

It is an arithmetic number, because the mean of its divisors is an integer number (202635).

2⁴⁰⁵²⁶⁹ is an apocalyptic number.

It is an amenable number.

405269 is a deficient number, since it is larger than the sum of its proper divisors (1).

405269 is an equidigital number, since it uses as much as digits as its factorization.

405269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 405269 is about 636.6074143458. The cubic root of 405269 is about 74.0027391243.

The spelling of 405269 in words is "four hundred five thousand, two hundred sixty-nine".