1247889052 has 6 divisors (see below), whose sum is σ = 2183805848. Its totient is φ = 623944524.

The previous prime is 1247888987. The next prime is 1247889107. The reversal of 1247889052 is 2509887421.

It is a super-2 number, since 2×1247889052² = 3114454172202917408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1247888993 and 1247889011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155986128 + ... + 155986135.

Almost surely, 2^1247889052 is an apocalyptic number.

It is an amenable number.

1247889052 is a deficient number, since it is larger than the sum of its proper divisors (935916796).

1247889052 is a wasteful number, since it uses less digits than its factorization.

1247889052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311972267 (or 311972265 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1247889052 is about 35325.4731320049. The cubic root of 1247889052 is about 1076.6106167352.

The spelling of 1247889052 in words is "one billion, two hundred forty-seven million, eight hundred eighty-nine thousand, fifty-two".