1331247052 has 6 divisors (see below), whose sum is σ = 2329682348. Its totient is φ = 665623524.

The previous prime is 1331247037. The next prime is 1331247077. The reversal of 1331247052 is 2507421331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331247052.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166405878 + ... + 166405885.

Almost surely, 2^1331247052 is an apocalyptic number.

It is an amenable number.

1331247052 is a deficient number, since it is larger than the sum of its proper divisors (998435296).

1331247052 is a wasteful number, since it uses less digits than its factorization.

1331247052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332811767 (or 332811765 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1331247052 is about 36486.2583995674. The cubic root of 1331247052 is about 1100.0680541918.

Adding to 1331247052 its reverse (2507421331), we get a palindrome (3838668383).

The spelling of 1331247052 in words is "one billion, three hundred thirty-one million, two hundred forty-seven thousand, fifty-two".