1011253605 has 8 divisors (see below), whose sum is σ = 1618005792. Its totient is φ = 539335248.

The previous prime is 1011253603. The next prime is 1011253609. The reversal of 1011253605 is 5063521101.

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

It is not a de Polignac number, because 1011253605 - 2¹ = 1011253603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011253603) 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 7 ways as a sum of consecutive naturals, for example, 33708439 + ... + 33708468.

It is an arithmetic number, because the mean of its divisors is an integer number (202250724).

Almost surely, 2^1011253605 is an apocalyptic number.

1011253605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011253605 is a deficient number, since it is larger than the sum of its proper divisors (606752187).

1011253605 is an equidigital number, since it uses as much as digits as its factorization.

1011253605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67416915.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1011253605 is about 31800.2139143749. The cubic root of 1011253605 is about 1003.7372174732.

Adding to 1011253605 its reverse (5063521101), we get a palindrome (6074774706).

The spelling of 1011253605 in words is "one billion, eleven million, two hundred fifty-three thousand, six hundred five".