1395509 has 4 divisors (see below), whose sum is σ = 1443660. Its totient is φ = 1347360.

The previous prime is 1395491. The next prime is 1395523. The reversal of 1395509 is 9055931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 874225 + 521284 = 935^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395509 - 2¹² = 1391413 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 (1395109) 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, 24032 + ... + 24089.

It is an arithmetic number, because the mean of its divisors is an integer number (360915).

2^1395509 is an apocalyptic number.

It is an amenable number.

1395509 is a deficient number, since it is larger than the sum of its proper divisors (48151).

1395509 is an equidigital number, since it uses as much as digits as its factorization.

1395509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48150.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 1395509 is about 1181.3166383320. The cubic root of 1395509 is about 111.7491462615.

The spelling of 1395509 in words is "one million, three hundred ninety-five thousand, five hundred nine".