1298655 has 12 divisors (see below), whose sum is σ = 2251080. Its totient is φ = 692592.

The previous prime is 1298653. The next prime is 1298699. The reversal of 1298655 is 5568921.

It is a happy number.

It is not a de Polignac number, because 1298655 - 2¹ = 1298653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298651) 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 11 ways as a sum of consecutive naturals, for example, 14385 + ... + 14474.

It is an arithmetic number, because the mean of its divisors is an integer number (187590).

2^1298655 is an apocalyptic number.

1298655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1298655 is a deficient number, since it is larger than the sum of its proper divisors (952425).

1298655 is a wasteful number, since it uses less digits than its factorization.

1298655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28870 (or 28867 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1298655 is about 1139.5854509426. The cubic root of 1298655 is about 109.1016362557.

It can be divided in two parts, 12986 and 55, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 1298655 in words is "one million, two hundred ninety-eight thousand, six hundred fifty-five".