1131401155 has 8 divisors (see below), whose sum is σ = 1386568512. Its totient is φ = 885862848.

The previous prime is 1131401149. The next prime is 1131401171. The reversal of 1131401155 is 5511041311.

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 1131401155 - 2¹³ = 1131392963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2407002 + ... + 2407471.

It is an arithmetic number, because the mean of its divisors is an integer number (173321064).

Almost surely, 2^1131401155 is an apocalyptic number.

1131401155 is a deficient number, since it is larger than the sum of its proper divisors (255167357).

1131401155 is an equidigital number, since it uses as much as digits as its factorization.

1131401155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4814525.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 1131401155 is about 33636.3070951613. The cubic root of 1131401155 is about 1042.0107655800.

Adding to 1131401155 its reverse (5511041311), we get a palindrome (6642442466).

The spelling of 1131401155 in words is "one billion, one hundred thirty-one million, four hundred one thousand, one hundred fifty-five".