405553 has 2 divisors, whose sum is σ = 405554. Its totient is φ = 405552.

The previous prime is 405541. The next prime is 405577. The reversal of 405553 is 355504.

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., 388129 + 17424 = 623^2 + 132^2 .

It is a cyclic number.

It is not a de Polignac number, because 405553 - 2⁵ = 405521 is a prime.

It is equal to p₃₄₂₆₇ and since 405553 and 34267 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (405253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202776 + 202777.

It is an arithmetic number, because the mean of its divisors is an integer number (202777).

2⁴⁰⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

405553 is a deficient number, since it is larger than the sum of its proper divisors (1).

405553 is an equidigital number, since it uses as much as digits as its factorization.

405553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 405553 is about 636.8304326899. The cubic root of 405553 is about 74.0200213661.

The spelling of 405553 in words is "four hundred five thousand, five hundred fifty-three".