1225129 has 2 divisors, whose sum is σ = 1225130. Its totient is φ = 1225128.

The previous prime is 1225127. The next prime is 1225153. The reversal of 1225129 is 9215221.

1225129 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 15129 = 1100^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225129 - 2¹ = 1225127 is a prime.

Together with 1225127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1225123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612564 + 612565.

It is an arithmetic number, because the mean of its divisors is an integer number (612565).

2^1225129 is an apocalyptic number.

It is an amenable number.

1225129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225129 is an equidigital number, since it uses as much as digits as its factorization.

1225129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 1225129 is about 1106.8554557845. The cubic root of 1225129 is about 107.0025037991.

The spelling of 1225129 in words is "one million, two hundred twenty-five thousand, one hundred twenty-nine".