1131400144 has 40 divisors (see below), whose sum is σ = 2637103040. Its totient is φ = 459364608.

The previous prime is 1131400139. The next prime is 1131400157. The reversal of 1131400144 is 4410041311.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263709 + ... + 267964.

It is an arithmetic number, because the mean of its divisors is an integer number (65927576).

Almost surely, 2^1131400144 is an apocalyptic number.

1131400144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1131400144 is an abundant number, since it is smaller than the sum of its proper divisors (1505702896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131400144 is a wasteful number, since it uses less digits than its factorization.

1131400144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531707 (or 531701 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1131400144 is about 33636.2920667543. The cubic root of 1131400144 is about 1042.0104552058.

Adding to 1131400144 its reverse (4410041311), we get a palindrome (5541441455).

The spelling of 1131400144 in words is "one billion, one hundred thirty-one million, four hundred thousand, one hundred forty-four".