1247151530 has 16 divisors (see below), whose sum is σ = 2299626504. Its totient is φ = 486693120.

The previous prime is 1247151509. The next prime is 1247151541. The reversal of 1247151530 is 351517421.

It can be written as a sum of positive squares in 4 ways, for example, as 911858809 + 335292721 = 30197^2 + 18311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1247151493 and 1247151502.

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 in 7 ways as a sum of consecutive naturals, for example, 1520507 + ... + 1521326.

Almost surely, 2^1247151530 is an apocalyptic number.

1247151530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247151530 is a deficient number, since it is larger than the sum of its proper divisors (1052474974).

1247151530 is a wasteful number, since it uses less digits than its factorization.

1247151530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041881.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1247151530 is about 35315.0326348426. The cubic root of 1247151530 is about 1076.3984770175.

Adding to 1247151530 its reverse (351517421), we get a palindrome (1598668951).

The spelling of 1247151530 in words is "one billion, two hundred forty-seven million, one hundred fifty-one thousand, five hundred thirty".