1131222405 has 8 divisors (see below), whose sum is σ = 1809955872. Its totient is φ = 603318608.

The previous prime is 1131222403. The next prime is 1131222413. The reversal of 1131222405 is 5042221311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131222405 - 2¹ = 1131222403 is a prime.

It is a super-4 number, since 4×1131222405⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131222403) 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, 37707399 + ... + 37707428.

It is an arithmetic number, because the mean of its divisors is an integer number (226244484).

Almost surely, 2^1131222405 is an apocalyptic number.

1131222405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131222405 is a deficient number, since it is larger than the sum of its proper divisors (678733467).

1131222405 is an equidigital number, since it uses as much as digits as its factorization.

1131222405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75414835.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1131222405 is about 33633.6498911432. The cubic root of 1131222405 is about 1041.9558869506.

Adding to 1131222405 its reverse (5042221311), we get a palindrome (6173443716).

The spelling of 1131222405 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred five".