1225039 has 4 divisors (see below), whose sum is σ = 1254960. Its totient is φ = 1195120.

The previous prime is 1225019. The next prime is 1225061. The reversal of 1225039 is 9305221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9305221 = 109 ⋅85369.

It is a cyclic number.

It is not a de Polignac number, because 1225039 - 2¹³ = 1216847 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 (1225009) 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, 14899 + ... + 14980.

It is an arithmetic number, because the mean of its divisors is an integer number (313740).

2^1225039 is an apocalyptic number.

1225039 is a deficient number, since it is larger than the sum of its proper divisors (29921).

1225039 is an equidigital number, since it uses as much as digits as its factorization.

1225039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29920.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1225039 is about 1106.8147993228. The cubic root of 1225039 is about 106.9998835414. Note that the first 3 decimals are identical.

The spelling of 1225039 in words is "one million, two hundred twenty-five thousand, thirty-nine".