1331402142 has 48 divisors (see below), whose sum is σ = 3099012480. Its totient is φ = 373442976.

The previous prime is 1331402129. The next prime is 1331402161. The reversal of 1331402142 is 2412041331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 1816008 + ... + 1816740.

It is an arithmetic number, because the mean of its divisors is an integer number (64562760).

Almost surely, 2^1331402142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331402142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549506240).

1331402142 is an abundant number, since it is smaller than the sum of its proper divisors (1767610338).

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

1331402142 is an frugal number, since it uses more digits than its factorization.

1331402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1331402142 is about 36488.3836583645. The cubic root of 1331402142 is about 1100.1107717648.

Adding to 1331402142 its reverse (2412041331), we get a palindrome (3743443473).

The spelling of 1331402142 in words is "one billion, three hundred thirty-one million, four hundred two thousand, one hundred forty-two".