1005450253 has 8 divisors (see below), whose sum is σ = 1018317816. Its totient is φ = 992640000.

The previous prime is 1005450239. The next prime is 1005450263. The reversal of 1005450253 is 3520545001.

It can be written as a sum of positive squares in 4 ways, for example, as 439866729 + 565583524 = 20973^2 + 23782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1005450253 - 2²⁹ = 468579341 is a prime.

It is a super-2 number, since 2×1005450253² = 2021860422515528018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005450233) 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 7 ways as a sum of consecutive naturals, for example, 21553 + ... + 49753.

It is an arithmetic number, because the mean of its divisors is an integer number (127289727).

Almost surely, 2^1005450253 is an apocalyptic number.

It is an amenable number.

1005450253 is a deficient number, since it is larger than the sum of its proper divisors (12867563).

1005450253 is a wasteful number, since it uses less digits than its factorization.

1005450253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28655.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1005450253 is about 31708.8355667628. The cubic root of 1005450253 is about 1001.8134603735.

Adding to 1005450253 its reverse (3520545001), we get a palindrome (4525995254).

The spelling of 1005450253 in words is "one billion, five million, four hundred fifty thousand, two hundred fifty-three".