1299128 has 8 divisors (see below), whose sum is σ = 2435880. Its totient is φ = 649560.

The previous prime is 1299101. The next prime is 1299143. The reversal of 1299128 is 8219921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1299094 and 1299103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81188 + ... + 81203.

It is an arithmetic number, because the mean of its divisors is an integer number (304485).

2^1299128 is an apocalyptic number.

It is an amenable number.

1299128 is a deficient number, since it is larger than the sum of its proper divisors (1136752).

1299128 is a wasteful number, since it uses less digits than its factorization.

1299128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162397 (or 162393 counting only the distinct ones).

The product of its digits is 2592, while the sum is 32.

The square root of 1299128 is about 1139.7929636561. The cubic root of 1299128 is about 109.1148804225.

The spelling of 1299128 in words is "one million, two hundred ninety-nine thousand, one hundred twenty-eight".