1125321155 has 16 divisors (see below), whose sum is σ = 1544147904. Its totient is φ = 771223680.

The previous prime is 1125321149. The next prime is 1125321163. The reversal of 1125321155 is 5511235211.

It is not a de Polignac number, because 1125321155 - 2⁴ = 1125321139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64025 + ... + 79685.

It is an arithmetic number, because the mean of its divisors is an integer number (96509244).

Almost surely, 2^1125321155 is an apocalyptic number.

1125321155 is a deficient number, since it is larger than the sum of its proper divisors (418826749).

1125321155 is a wasteful number, since it uses less digits than its factorization.

1125321155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17726.

The product of its digits is 1500, while the sum is 26.

The square root of 1125321155 is about 33545.8068169481. The cubic root of 1125321155 is about 1040.1408694167.

Adding to 1125321155 its reverse (5511235211), we get a palindrome (6636556366).

The spelling of 1125321155 in words is "one billion, one hundred twenty-five million, three hundred twenty-one thousand, one hundred fifty-five".