1331615042 has 4 divisors (see below), whose sum is σ = 1997422566. Its totient is φ = 665807520.

The previous prime is 1331614997. The next prime is 1331615059. The reversal of 1331615042 is 2405161331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1116963241 + 214651801 = 33421^2 + 14651^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332903759 + ... + 332903762.

Almost surely, 2^1331615042 is an apocalyptic number.

1331615042 is a deficient number, since it is larger than the sum of its proper divisors (665807524).

1331615042 is an equidigital number, since it uses as much as digits as its factorization.

1331615042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665807523.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1331615042 is about 36491.3009085727. The cubic root of 1331615042 is about 1100.1694069668.

Adding to 1331615042 its reverse (2405161331), we get a palindrome (3736776373).

The spelling of 1331615042 in words is "one billion, three hundred thirty-one million, six hundred fifteen thousand, forty-two".