1123013545 has 8 divisors (see below), whose sum is σ = 1394085960. Its totient is φ = 867431040.

The previous prime is 1123013543. The next prime is 1123013561. The reversal of 1123013545 is 5453103211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197880489 + 925133056 = 14067^2 + 30416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123013545 - 2¹ = 1123013543 is a prime.

It is a super-2 number, since 2×1123013545² = 2522318844506934050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123013543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3872316 + ... + 3872605.

It is an arithmetic number, because the mean of its divisors is an integer number (174260745).

Almost surely, 2^1123013545 is an apocalyptic number.

It is an amenable number.

1123013545 is a deficient number, since it is larger than the sum of its proper divisors (271072415).

1123013545 is an equidigital number, since it uses as much as digits as its factorization.

1123013545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744955.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1123013545 is about 33511.3942562824. The cubic root of 1123013545 is about 1039.4294037771.

Adding to 1123013545 its reverse (5453103211), we get a palindrome (6576116756).

The spelling of 1123013545 in words is "one billion, one hundred twenty-three million, thirteen thousand, five hundred forty-five".