1539225 has 18 divisors (see below), whose sum is σ = 2757326. Its totient is φ = 820800.

The previous prime is 1539217. The next prime is 1539227. The reversal of 1539225 is 5229351.

It can be written as a sum of positive squares in 3 ways, for example, as 219024 + 1320201 = 468^2 + 1149^2 .

It is not a de Polignac number, because 1539225 - 2³ = 1539217 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1539227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3196 + ... + 3645.

2^1539225 is an apocalyptic number.

1539225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1539225 is a deficient number, since it is larger than the sum of its proper divisors (1218101).

1539225 is a wasteful number, since it uses less digits than its factorization.

1539225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857 (or 6849 counting only the distinct ones).

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

The square root of 1539225 is about 1240.6550689051. The cubic root of 1539225 is about 115.4606601278.

It can be divided in two parts, 1539 and 225, that added together give a square (1764 = 42²).

The spelling of 1539225 in words is "one million, five hundred thirty-nine thousand, two hundred twenty-five".