1005402253 has 8 divisors (see below), whose sum is σ = 1065303360. Its totient is φ = 945585600.

The previous prime is 1005402241. The next prime is 1005402257. The reversal of 1005402253 is 3522045001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005402253 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288 + ... + 45046.

It is an arithmetic number, because the mean of its divisors is an integer number (133162920).

Almost surely, 2^1005402253 is an apocalyptic number.

It is an amenable number.

1005402253 is a deficient number, since it is larger than the sum of its proper divisors (59901107).

1005402253 is a wasteful number, since it uses less digits than its factorization.

1005402253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42227.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1005402253 is about 31708.0786709003. The cubic root of 1005402253 is about 1001.7975179931.

Adding to 1005402253 its reverse (3522045001), we get a palindrome (4527447254).

The spelling of 1005402253 in words is "one billion, five million, four hundred two thousand, two hundred fifty-three".