1247429489 has 8 divisors (see below), whose sum is σ = 1251255720. Its totient is φ = 1243610496.

The previous prime is 1247429483. The next prime is 1247429497. The reversal of 1247429489 is 9849247421.

It can be written as a sum of positive squares in 4 ways, for example, as 236698225 + 1010731264 = 15385^2 + 31792^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247429489 - 2⁸ = 1247429233 is a prime.

It is a super-2 number, since 2×1247429489² = 3112160660053602242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247429483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606587 + ... + 608639.

It is an arithmetic number, because the mean of its divisors is an integer number (156406965).

Almost surely, 2^1247429489 is an apocalyptic number.

It is an amenable number.

1247429489 is a deficient number, since it is larger than the sum of its proper divisors (3826231).

1247429489 is an equidigital number, since it uses as much as digits as its factorization.

1247429489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its digits is 1161216, while the sum is 50.

The square root of 1247429489 is about 35318.9678359943. The cubic root of 1247429489 is about 1076.4784385437.

The spelling of 1247429489 in words is "one billion, two hundred forty-seven million, four hundred twenty-nine thousand, four hundred eighty-nine".