1161256103 has 8 divisors (see below), whose sum is σ = 1334027808. Its totient is φ = 990203904.

The previous prime is 1161256091. The next prime is 1161256121. The reversal of 1161256103 is 3016521611.

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 1161256103 - 2¹⁸ = 1160993959 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 (1161256133) 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 7 ways as a sum of consecutive naturals, for example, 428426 + ... + 431127.

It is an arithmetic number, because the mean of its divisors is an integer number (166753476).

Almost surely, 2^1161256103 is an apocalyptic number.

1161256103 is a deficient number, since it is larger than the sum of its proper divisors (172771705).

1161256103 is an equidigital number, since it uses as much as digits as its factorization.

1161256103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859753.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1161256103 is about 34077.2079695506. The cubic root of 1161256103 is about 1051.0966932916.

Adding to 1161256103 its reverse (3016521611), we get a palindrome (4177777714).

The spelling of 1161256103 in words is "one billion, one hundred sixty-one million, two hundred fifty-six thousand, one hundred three".