1268129 has 4 divisors (see below), whose sum is σ = 1288980. Its totient is φ = 1247280.

The previous prime is 1268119. The next prime is 1268143. The reversal of 1268129 is 9218621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9218621 = 2909 ⋅3169.

It can be written as a sum of positive squares in 2 ways, for example, as 528529 + 739600 = 727^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268129 - 2⁸ = 1267873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10334 + ... + 10455.

It is an arithmetic number, because the mean of its divisors is an integer number (322245).

2^1268129 is an apocalyptic number.

It is an amenable number.

1268129 is a deficient number, since it is larger than the sum of its proper divisors (20851).

1268129 is an equidigital number, since it uses as much as digits as its factorization.

1268129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20850.

The product of its digits is 1728, while the sum is 29.

The square root of 1268129 is about 1126.1123389787. The cubic root of 1268129 is about 108.2400069358.

The spelling of 1268129 in words is "one million, two hundred sixty-eight thousand, one hundred twenty-nine".