1249129 has 4 divisors (see below), whose sum is σ = 1427584. Its totient is φ = 1070676.

The previous prime is 1249121. The next prime is 1249133. The reversal of 1249129 is 9219421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1249129 - 2³ = 1249121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1249097 and 1249106.

It is not an unprimeable number, because it can be changed into a prime (1249121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89217 + ... + 89230.

It is an arithmetic number, because the mean of its divisors is an integer number (356896).

2^1249129 is an apocalyptic number.

It is an amenable number.

1249129 is a deficient number, since it is larger than the sum of its proper divisors (178455).

1249129 is an equidigital number, since it uses as much as digits as its factorization.

1249129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178454.

The product of its digits is 1296, while the sum is 28.

The square root of 1249129 is about 1117.6443978296. The cubic root of 1249129 is about 107.6967085198.

It can be divided in two parts, 1249 and 129, that added together give a triangular number (1378 = T₅₂).

The spelling of 1249129 in words is "one million, two hundred forty-nine thousand, one hundred twenty-nine".