1299945 has 16 divisors (see below), whose sum is σ = 2108160. Its totient is φ = 683904.

The previous prime is 1299941. The next prime is 1299953. The reversal of 1299945 is 5499921.

It is not a de Polignac number, because 1299945 - 2² = 1299941 is a prime.

1299945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1299941) 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 15 ways as a sum of consecutive naturals, for example, 637 + ... + 1733.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2^1299945 is an apocalyptic number.

1299945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1299945 is a deficient number, since it is larger than the sum of its proper divisors (808215).

1299945 is a wasteful number, since it uses less digits than its factorization.

1299945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 29160, while the sum is 39.

The square root of 1299945 is about 1140.1513057485. The cubic root of 1299945 is about 109.1377491406.

The spelling of 1299945 in words is "one million, two hundred ninety-nine thousand, nine hundred forty-five".