1331402042 has 16 divisors (see below), whose sum is σ = 2010202920. Its totient is φ = 661344768.

The previous prime is 1331402027. The next prime is 1331402053. The reversal of 1331402042 is 2402041331.

It can be written as a sum of positive squares in 4 ways, for example, as 1131716881 + 199685161 = 33641^2 + 14131^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316658 + ... + 320834.

Almost surely, 2^1331402042 is an apocalyptic number.

1331402042 is a deficient number, since it is larger than the sum of its proper divisors (678800878).

1331402042 is a wasteful number, since it uses less digits than its factorization.

1331402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1331402042 is about 36488.3822880653. The cubic root of 1331402042 is about 1100.1107442222.

Adding to 1331402042 its reverse (2402041331), we get a palindrome (3733443373).

The spelling of 1331402042 in words is "one billion, three hundred thirty-one million, four hundred two thousand, forty-two".