1506609 has 24 divisors (see below), whose sum is σ = 2387840. Its totient is φ = 909792.

The previous prime is 1506607. The next prime is 1506611. The reversal of 1506609 is 9066051.

1506609 is a `hidden beast` number, since 1 + 50 + 6 + 609 = 666.

It is an interprime number because it is at equal distance from previous prime (1506607) and next prime (1506611).

It is not a de Polignac number, because 1506609 - 2¹ = 1506607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1506607) 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 23 ways as a sum of consecutive naturals, for example, 9162 + ... + 9324.

2^1506609 is an apocalyptic number.

It is an amenable number.

1506609 is a deficient number, since it is larger than the sum of its proper divisors (881231).

1506609 is a wasteful number, since it uses less digits than its factorization.

1506609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1506609 is about 1227.4400189011. The cubic root of 1506609 is about 114.6392983103.

The spelling of 1506609 in words is "one million, five hundred six thousand, six hundred nine".