1131203142 has 24 divisors (see below), whose sum is σ = 2451956520. Its totient is φ = 376911360.

The previous prime is 1131203141. The next prime is 1131203153. The reversal of 1131203142 is 2413021311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131203141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36717 + ... + 60087.

It is an arithmetic number, because the mean of its divisors is an integer number (102164855).

Almost surely, 2^1131203142 is an apocalyptic number.

1131203142 is an abundant number, since it is smaller than the sum of its proper divisors (1320753378).

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

1131203142 is a wasteful number, since it uses less digits than its factorization.

1131203142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26068 (or 26065 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1131203142 is about 33633.3635249286. The cubic root of 1131203142 is about 1041.9499726081.

Adding to 1131203142 its reverse (2413021311), we get a palindrome (3544224453).

The spelling of 1131203142 in words is "one billion, one hundred thirty-one million, two hundred three thousand, one hundred forty-two".