1331989242 has 16 divisors (see below), whose sum is σ = 2725932000. Its totient is φ = 433670832.

The previous prime is 1331989237. The next prime is 1331989247. The reversal of 1331989242 is 2429891331.

It is an interprime number because it is at equal distance from previous prime (1331989237) and next prime (1331989247).

It is a junction number, because it is equal to n+sod(n) for n = 1331989194 and 1331989203.

It is not an unprimeable number, because it can be changed into a prime (1331989247) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2581117 + ... + 2581632.

It is an arithmetic number, because the mean of its divisors is an integer number (170370750).

Almost surely, 2^1331989242 is an apocalyptic number.

1331989242 is an abundant number, since it is smaller than the sum of its proper divisors (1393942758).

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

1331989242 is a wasteful number, since it uses less digits than its factorization.

1331989242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162797.

The product of its digits is 93312, while the sum is 42.

The square root of 1331989242 is about 36496.4277977996. The cubic root of 1331989242 is about 1100.2724509703.

The spelling of 1331989242 in words is "one billion, three hundred thirty-one million, nine hundred eighty-nine thousand, two hundred forty-two".