1331402143 has 16 divisors (see below), whose sum is σ = 1437861600. Its totient is φ = 1228677120.

The previous prime is 1331402129. The next prime is 1331402161. The reversal of 1331402143 is 3412041331.

It is a cyclic number.

It is not a de Polignac number, because 1331402143 - 2¹³ = 1331393951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331402843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 944223 + ... + 945631.

It is an arithmetic number, because the mean of its divisors is an integer number (89866350).

Almost surely, 2^1331402143 is an apocalyptic number.

1331402143 is a deficient number, since it is larger than the sum of its proper divisors (106459457).

1331402143 is a wasteful number, since it uses less digits than its factorization.

1331402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1331402143 is about 36488.3836720675. The cubic root of 1331402143 is about 1100.1107720403.

Adding to 1331402143 its reverse (3412041331), we get a palindrome (4743443474).

The spelling of 1331402143 in words is "one billion, three hundred thirty-one million, four hundred two thousand, one hundred forty-three".