1289130252649 has 8 divisors (see below), whose sum is σ = 1291693561920. Its totient is φ = 1286567698416.

The previous prime is 1289130252647. The next prime is 1289130252659. The reversal of 1289130252649 is 9462520319821.

It is a happy number.

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 1289130252649 - 2¹ = 1289130252647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1289130252596 and 1289130252605.

It is not an unprimeable number, because it can be changed into a prime (1289130252643) 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, 3293067 + ... + 3663679.

It is an arithmetic number, because the mean of its divisors is an integer number (161461695240).

Almost surely, 2^{1289130252649} is an apocalyptic number.

It is an amenable number.

1289130252649 is a deficient number, since it is larger than the sum of its proper divisors (2563309271).

1289130252649 is an equidigital number, since it uses as much as digits as its factorization.

1289130252649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377519.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 1289130252649 in words is "one trillion, two hundred eighty-nine billion, one hundred thirty million, two hundred fifty-two thousand, six hundred forty-nine".