1124121645 has 56 divisors (see below), whose sum is σ = 2053126176. Its totient is φ = 590455008.

The previous prime is 1124121613. The next prime is 1124121667. The reversal of 1124121645 is 5461214211.

1124121645 is a `hidden beast` number, since 1 + 1 + 2 + 4 + 12 + 1 + 645 = 666.

It is not a de Polignac number, because 1124121645 - 2⁵ = 1124121613 is a prime.

It is a super-3 number, since 3×1124121645³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 241914 + ... + 246516.

Almost surely, 2^1124121645 is an apocalyptic number.

1124121645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1124121645 is a deficient number, since it is larger than the sum of its proper divisors (929004531).

1124121645 is an frugal number, since it uses more digits than its factorization.

1124121645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4678 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1124121645 is about 33527.9233624750. The cubic root of 1124121645 is about 1039.7711666772.

Adding to 1124121645 its reverse (5461214211), we get a palindrome (6585335856).

The spelling of 1124121645 in words is "one billion, one hundred twenty-four million, one hundred twenty-one thousand, six hundred forty-five".