1005149 has 4 divisors (see below), whose sum is σ = 1010400. Its totient is φ = 999900.

The previous prime is 1005143. The next prime is 1005161. The reversal of 1005149 is 9415001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9415001 = 151 ⋅62351.

It is a cyclic number.

It is not a de Polignac number, because 1005149 - 2⁴ = 1005133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2327 + ... + 2724.

It is an arithmetic number, because the mean of its divisors is an integer number (252600).

2^1005149 is an apocalyptic number.

It is an amenable number.

1005149 is a deficient number, since it is larger than the sum of its proper divisors (5251).

1005149 is an equidigital number, since it uses as much as digits as its factorization.

1005149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1005149 is about 1002.5711944795. The cubic root of 1005149 is about 100.1713395931.

The spelling of 1005149 in words is "one million, five thousand, one hundred forty-nine".