1123545501 has 12 divisors (see below), whose sum is σ = 1747737628. Its totient is φ = 691412544.

The previous prime is 1123545497. The next prime is 1123545503. The reversal of 1123545501 is 1055453211.

1123545501 is a `hidden beast` number, since 112 + 3 + 5 + 45 + 501 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 494840025 + 628705476 = 22245^2 + 25074^2 .

It is not a de Polignac number, because 1123545501 - 2² = 1123545497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123545503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4801360 + ... + 4801593.

Almost surely, 2^1123545501 is an apocalyptic number.

It is an amenable number.

1123545501 is a deficient number, since it is larger than the sum of its proper divisors (624192127).

1123545501 is a wasteful number, since it uses less digits than its factorization.

1123545501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9602972 (or 9602969 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1123545501 is about 33519.3302588223. The cubic root of 1123545501 is about 1039.5934989857.

Adding to 1123545501 its reverse (1055453211), we get a palindrome (2178998712).

It can be divided in two parts, 112354 and 5501, that added together give a triangular number (117855 = T₄₈₅).

The spelling of 1123545501 in words is "one billion, one hundred twenty-three million, five hundred forty-five thousand, five hundred one".