1331142 has 16 divisors (see below), whose sum is σ = 2706672. Its totient is φ = 436320.

The previous prime is 1331123. The next prime is 1331153. The reversal of 1331142 is 2411331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453 + ... + 2184.

It is an arithmetic number, because the mean of its divisors is an integer number (169167).

2^1331142 is an apocalyptic number.

1331142 is an abundant number, since it is smaller than the sum of its proper divisors (1375530).

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

1331142 is a wasteful number, since it uses less digits than its factorization.

1331142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703.

The product of its digits is 72, while the sum is 15.

The square root of 1331142 is about 1153.7512730220. The cubic root of 1331142 is about 110.0039117066.

Adding to 1331142 its reverse (2411331), we get a palindrome (3742473).

It can be divided in two parts, 133 and 1142, that added together give a triangular number (1275 = T₅₀).

The spelling of 1331142 in words is "one million, three hundred thirty-one thousand, one hundred forty-two".