1005402252 has 48 divisors (see below), whose sum is σ = 2485226240. Its totient is φ = 315461952.

The previous prime is 1005402241. The next prime is 1005402257. The reversal of 1005402252 is 2522045001.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1005402257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21753 + ... + 49839.

Almost surely, 2^1005402252 is an apocalyptic number.

1005402252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1005402252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1242613120).

1005402252 is an abundant number, since it is smaller than the sum of its proper divisors (1479823988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005402252 is a wasteful number, since it uses less digits than its factorization.

1005402252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28270 (or 28268 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1005402252 is about 31708.0786551314. The cubic root of 1005402252 is about 1001.7975176610.

Adding to 1005402252 its reverse (2522045001), we get a palindrome (3527447253).

The spelling of 1005402252 in words is "one billion, five million, four hundred two thousand, two hundred fifty-two".