1131205424 has 40 divisors (see below), whose sum is σ = 2231434560. Its totient is φ = 555429888.

The previous prime is 1131205417. The next prime is 1131205459. The reversal of 1131205424 is 4245021311.

It is a super-2 number, since 2×1131205424² = 2559251422574039552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131205424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241634 + ... + 246270.

It is an arithmetic number, because the mean of its divisors is an integer number (55785864).

Almost surely, 2^1131205424 is an apocalyptic number.

It is an amenable number.

1131205424 is a deficient number, since it is larger than the sum of its proper divisors (1100229136).

1131205424 is a wasteful number, since it uses less digits than its factorization.

1131205424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4917 (or 4911 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1131205424 is about 33633.3974495590. The cubic root of 1131205424 is about 1041.9506732569.

Adding to 1131205424 its reverse (4245021311), we get a palindrome (5376226735).

The spelling of 1131205424 in words is "one billion, one hundred thirty-one million, two hundred five thousand, four hundred twenty-four".