1123494645 has 128 divisors (see below), whose sum is σ = 2287853568. Its totient is φ = 458265600.

The previous prime is 1123494641. The next prime is 1123494649. The reversal of 1123494645 is 5464943211.

It is an interprime number because it is at equal distance from previous prime (1123494641) and next prime (1123494649).

It is not a de Polignac number, because 1123494645 - 2² = 1123494641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123494641) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8576230 + ... + 8576360.

It is an arithmetic number, because the mean of its divisors is an integer number (17873856).

Almost surely, 2^1123494645 is an apocalyptic number.

1123494645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123494645 is an abundant number, since it is smaller than the sum of its proper divisors (1164358923).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123494645 is a wasteful number, since it uses less digits than its factorization.

1123494645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its digits is 103680, while the sum is 39.

The square root of 1123494645 is about 33518.5716431951. The cubic root of 1123494645 is about 1039.5778134128.

The spelling of 1123494645 in words is "one billion, one hundred twenty-three million, four hundred ninety-four thousand, six hundred forty-five".