1123101405 has 24 divisors (see below), whose sum is σ = 1966785912. Its totient is φ = 592809984.

The previous prime is 1123101361. The next prime is 1123101407. The reversal of 1123101405 is 5041013211.

1123101405 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 46539684 + 1076561721 = 6822^2 + 32811^2 .

It is not a de Polignac number, because 1123101405 - 2⁸ = 1123101149 is a prime.

It is a super-2 number, since 2×1123101405² = 2522713531825948050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123101407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124284 + ... + 133013.

It is an arithmetic number, because the mean of its divisors is an integer number (81949413).

Almost surely, 2^1123101405 is an apocalyptic number.

1123101405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123101405 is a deficient number, since it is larger than the sum of its proper divisors (843684507).

1123101405 is a wasteful number, since it uses less digits than its factorization.

1123101405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257405 (or 257402 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1123101405 is about 33512.7051280555. The cubic root of 1123101405 is about 1039.4565099761.

Adding to 1123101405 its reverse (5041013211), we get a palindrome (6164114616).

The spelling of 1123101405 in words is "one billion, one hundred twenty-three million, one hundred one thousand, four hundred five".