1309225 has 6 divisors (see below), whose sum is σ = 1623470. Its totient is φ = 1047360.

The previous prime is 1309219. The next prime is 1309237. The reversal of 1309225 is 5229031.

It can be written as a sum of positive squares in 3 ways, for example, as 166464 + 1142761 = 408^2 + 1069^2 .

It is not a de Polignac number, because 1309225 - 2¹³ = 1301033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1309196 and 1309205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26160 + ... + 26209.

2^1309225 is an apocalyptic number.

It is an amenable number.

1309225 is a deficient number, since it is larger than the sum of its proper divisors (314245).

1309225 is an equidigital number, since it uses as much as digits as its factorization.

1309225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52379 (or 52374 counting only the distinct ones).

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

The square root of 1309225 is about 1144.2137038159. The cubic root of 1309225 is about 109.3968364564.

The spelling of 1309225 in words is "one million, three hundred nine thousand, two hundred twenty-five".