1000655 has 4 divisors (see below), whose sum is σ = 1200792. Its totient is φ = 800520.

The previous prime is 1000651. The next prime is 1000667. The reversal of 1000655 is 5560001.

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

It is not a de Polignac number, because 1000655 - 2² = 1000651 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 (1000651) 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, 100061 + ... + 100070.

It is an arithmetic number, because the mean of its divisors is an integer number (300198).

2^1000655 is an apocalyptic number.

1000655 is a deficient number, since it is larger than the sum of its proper divisors (200137).

1000655 is an equidigital number, since it uses as much as digits as its factorization.

1000655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200136.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1000655 is about 1000.3274463894. The cubic root of 1000655 is about 100.0218285681.

Adding to 1000655 its reverse (5560001), we get a palindrome (6560656).

The spelling of 1000655 in words is "one million, six hundred fifty-five", and thus it is an aban number.