1061809 has 4 divisors (see below), whose sum is σ = 1213504. Its totient is φ = 910116.

The previous prime is 1061807. The next prime is 1061831. The reversal of 1061809 is 9081601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1061809 - 2¹ = 1061807 is a prime.

It is a super-2 number, since 2×1061809² = 2254876704962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75837 + ... + 75850.

It is an arithmetic number, because the mean of its divisors is an integer number (303376).

2^1061809 is an apocalyptic number.

It is an amenable number.

1061809 is a deficient number, since it is larger than the sum of its proper divisors (151695).

1061809 is an equidigital number, since it uses as much as digits as its factorization.

1061809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151694.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1061809 is about 1030.4411676559. The cubic root of 1061809 is about 102.0192517807.

The spelling of 1061809 in words is "one million, sixty-one thousand, eight hundred nine".