1005042449 has 4 divisors (see below), whose sum is σ = 1057939440. Its totient is φ = 952145460.

The previous prime is 1005042443. The next prime is 1005042461. The reversal of 1005042449 is 9442405001.

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: 9442405001 = 41 ⋅230302561.

It is a cyclic number.

It is not a de Polignac number, because 1005042449 - 2²⁰ = 1003993873 is a prime.

It is a super-2 number, since 2×1005042449² = 2020220648583835202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005042443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26448467 + ... + 26448504.

It is an arithmetic number, because the mean of its divisors is an integer number (264484860).

Almost surely, 2^1005042449 is an apocalyptic number.

1005042449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1005042449 is a deficient number, since it is larger than the sum of its proper divisors (52896991).

1005042449 is an equidigital number, since it uses as much as digits as its factorization.

1005042449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52896990.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1005042449 is about 31702.4044671694. The cubic root of 1005042449 is about 1001.6779990775.

The spelling of 1005042449 in words is "one billion, five million, forty-two thousand, four hundred forty-nine".