1225829 has 4 divisors (see below), whose sum is σ = 1337280. Its totient is φ = 1114380.

The previous prime is 1225817. The next prime is 1225849. The reversal of 1225829 is 9285221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9285221 = 11 ⋅844111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225849) 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, 55709 + ... + 55730.

It is an arithmetic number, because the mean of its divisors is an integer number (334320).

2^1225829 is an apocalyptic number.

It is an amenable number.

1225829 is a deficient number, since it is larger than the sum of its proper divisors (111451).

1225829 is a wasteful number, since it uses less digits than its factorization.

1225829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111450.

The product of its digits is 2880, while the sum is 29.

The square root of 1225829 is about 1107.1716217462. The cubic root of 1225829 is about 107.0228792022.

The spelling of 1225829 in words is "one million, two hundred twenty-five thousand, eight hundred twenty-nine".