1247852387 has 2 divisors, whose sum is σ = 1247852388. Its totient is φ = 1247852386.

The previous prime is 1247852351. The next prime is 1247852399. The reversal of 1247852387 is 7832587421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1247852387 - 2¹² = 1247848291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1847852387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623926193 + 623926194.

It is an arithmetic number, because the mean of its divisors is an integer number (623926194).

Almost surely, 2^1247852387 is an apocalyptic number.

1247852387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247852387 is an equidigital number, since it uses as much as digits as its factorization.

1247852387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 47.

The square root of 1247852387 is about 35324.9541684062. The cubic root of 1247852387 is about 1076.6000724444.

The spelling of 1247852387 in words is "one billion, two hundred forty-seven million, eight hundred fifty-two thousand, three hundred eighty-seven".