1226129 has 4 divisors (see below), whose sum is σ = 1232676. Its totient is φ = 1219584.

The previous prime is 1226117. The next prime is 1226179. The reversal of 1226129 is 9216221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9216221 = 7 ⋅1316603.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 801025 = 652^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226129 - 2²⁰ = 177553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226179) 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, 2984 + ... + 3369.

It is an arithmetic number, because the mean of its divisors is an integer number (308169).

2^1226129 is an apocalyptic number.

It is an amenable number.

1226129 is a deficient number, since it is larger than the sum of its proper divisors (6547).

1226129 is an equidigital number, since it uses as much as digits as its factorization.

1226129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546.

The product of its digits is 432, while the sum is 23.

The square root of 1226129 is about 1107.3070938091. The cubic root of 1226129 is about 107.0316091433.

The spelling of 1226129 in words is "one million, two hundred twenty-six thousand, one hundred twenty-nine".