1131224145 has 16 divisors (see below), whose sum is σ = 1819341312. Its totient is φ = 600192000.

The previous prime is 1131224137. The next prime is 1131224167. The reversal of 1131224145 is 5414221311.

It is not a de Polignac number, because 1131224145 - 2³ = 1131224137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192481 + ... + 198270.

It is an arithmetic number, because the mean of its divisors is an integer number (113708832).

Almost surely, 2^1131224145 is an apocalyptic number.

1131224145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131224145 is a deficient number, since it is larger than the sum of its proper divisors (688117167).

1131224145 is a wasteful number, since it uses less digits than its factorization.

1131224145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390952.

The product of its digits is 960, while the sum is 24.

The square root of 1131224145 is about 33633.6757580851. The cubic root of 1131224145 is about 1041.9564211816.

Adding to 1131224145 its reverse (5414221311), we get a palindrome (6545445456).

The spelling of 1131224145 in words is "one billion, one hundred thirty-one million, two hundred twenty-four thousand, one hundred forty-five".