1299055 has 24 divisors (see below), whose sum is σ = 1768320. Its totient is φ = 913920.

The previous prime is 1299041. The next prime is 1299059. The reversal of 1299055 is 5509921.

It is a de Polignac number, because none of the positive numbers 2^k-1299055 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41890 + ... + 41920.

It is an arithmetic number, because the mean of its divisors is an integer number (73680).

2^1299055 is an apocalyptic number.

1299055 is a deficient number, since it is larger than the sum of its proper divisors (469265).

1299055 is a wasteful number, since it uses less digits than its factorization.

1299055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 1299055 is about 1139.7609398466. The cubic root of 1299055 is about 109.1128366065.

1299055 divided by its sum of digits (31) gives a triangular number (41905 = T₂₈₉).

The spelling of 1299055 in words is "one million, two hundred ninety-nine thousand, fifty-five".