1309125 has 16 divisors (see below), whose sum is σ = 2179008. Its totient is φ = 698000.

The previous prime is 1309123. The next prime is 1309127. The reversal of 1309125 is 5219031.

It is an interprime number because it is at equal distance from previous prime (1309123) and next prime (1309127).

It is not a de Polignac number, because 1309125 - 2¹ = 1309123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309123) 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 15 ways as a sum of consecutive naturals, for example, 1371 + ... + 2120.

It is an arithmetic number, because the mean of its divisors is an integer number (136188).

2^1309125 is an apocalyptic number.

1309125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1309125 is a deficient number, since it is larger than the sum of its proper divisors (869883).

1309125 is an equidigital number, since it uses as much as digits as its factorization.

1309125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509 (or 3499 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1309125 is about 1144.1700048507. The cubic root of 1309125 is about 109.3940511032.

The spelling of 1309125 in words is "one million, three hundred nine thousand, one hundred twenty-five".