1225539 has 24 divisors (see below), whose sum is σ = 2069600. Its totient is φ = 698544.

The previous prime is 1225529. The next prime is 1225541. The reversal of 1225539 is 9355221.

1225539 is a `hidden beast` number, since 122 + 5 + 539 = 666.

It is not a de Polignac number, because 1225539 - 2⁵ = 1225507 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2889 + ... + 3285.

2^1225539 is an apocalyptic number.

1225539 is a deficient number, since it is larger than the sum of its proper divisors (844061).

1225539 is an equidigital number, since it uses as much as digits as its factorization.

1225539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 407 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1225539 is about 1107.0406496602. The cubic root of 1225539 is about 107.0144389051.

It can be divided in two parts, 1225 and 539, that added together give a square (1764 = 42²).

The spelling of 1225539 in words is "one million, two hundred twenty-five thousand, five hundred thirty-nine".