1225839 has 8 divisors (see below), whose sum is σ = 1640880. Its totient is φ = 814016.

The previous prime is 1225817. The next prime is 1225849. The reversal of 1225839 is 9385221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225839 - 2⁹ = 1225327 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 307 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (205110).

2^1225839 is an apocalyptic number.

1225839 is a deficient number, since it is larger than the sum of its proper divisors (415041).

1225839 is a wasteful number, since it uses less digits than its factorization.

1225839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its digits is 4320, while the sum is 30.

The square root of 1225839 is about 1107.1761377486. The cubic root of 1225839 is about 107.0231702232.

The spelling of 1225839 in words is "one million, two hundred twenty-five thousand, eight hundred thirty-nine".