1289395148 has 6 divisors (see below), whose sum is σ = 2256441516. Its totient is φ = 644697572.

The previous prime is 1289395127. The next prime is 1289395153. The reversal of 1289395148 is 8415939821.

It is a junction number, because it is equal to n+sod(n) for n = 1289395096 and 1289395105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161174390 + ... + 161174397.

It is an arithmetic number, because the mean of its divisors is an integer number (376073586).

Almost surely, 2^1289395148 is an apocalyptic number.

It is an amenable number.

1289395148 is a deficient number, since it is larger than the sum of its proper divisors (967046368).

1289395148 is a wasteful number, since it uses less digits than its factorization.

1289395148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322348791 (or 322348789 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 1289395148 is about 35908.1487687684. The cubic root of 1289395148 is about 1088.4170688275.

The spelling of 1289395148 in words is "one billion, two hundred eighty-nine million, three hundred ninety-five thousand, one hundred forty-eight".