1005553 has 2 divisors, whose sum is σ = 1005554. Its totient is φ = 1005552.

The previous prime is 1005551. The next prime is 1005581. The reversal of 1005553 is 3555001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 908209 + 97344 = 953^2 + 312^2 .

It is an emirp because it is prime and its reverse (3555001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005553 - 2¹ = 1005551 is a prime.

It is a super-2 number, since 2×1005553² = 2022273671618, which contains 22 as substring.

Together with 1005551, it forms a pair of twin primes.

1005553 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005553.

It is not a weakly prime, because it can be changed into another prime (1005551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502776 + 502777.

It is an arithmetic number, because the mean of its divisors is an integer number (502777).

2^1005553 is an apocalyptic number.

It is an amenable number.

1005553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005553 is an equidigital number, since it uses as much as digits as its factorization.

1005553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 1005553 is about 1002.7726561888. The cubic root of 1005553 is about 100.1847584330.

The spelling of 1005553 in words is "one million, five thousand, five hundred fifty-three".