1161322253 has 32 divisors (see below), whose sum is σ = 1478373120. Its totient is φ = 887754240.

The previous prime is 1161322243. The next prime is 1161322277. The reversal of 1161322253 is 3522231611.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1161322253 - 2¹⁴ = 1161305869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161322243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397763 + ... + 400671.

It is an arithmetic number, because the mean of its divisors is an integer number (46199160).

Almost surely, 2^1161322253 is an apocalyptic number.

1161322253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1161322253 is a deficient number, since it is larger than the sum of its proper divisors (317050867).

1161322253 is a wasteful number, since it uses less digits than its factorization.

1161322253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077.

The product of its digits is 2160, while the sum is 26.

The square root of 1161322253 is about 34078.1785458085. The cubic root of 1161322253 is about 1051.1166511992.

Adding to 1161322253 its reverse (3522231611), we get a palindrome (4683553864).

The spelling of 1161322253 in words is "one billion, one hundred sixty-one million, three hundred twenty-two thousand, two hundred fifty-three".