1006631 has 4 divisors (see below), whose sum is σ = 1010472. Its totient is φ = 1002792.

The previous prime is 1006613. The next prime is 1006633. The reversal of 1006631 is 1366001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006631 is a prime.

It is a super-2 number, since 2×1006631² = 2026611940322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006633) 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, 1496 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (252618).

2^1006631 is an apocalyptic number.

1006631 is a deficient number, since it is larger than the sum of its proper divisors (3841).

1006631 is an equidigital number, since it uses as much as digits as its factorization.

1006631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1006631 is about 1003.3100218776. The cubic root of 1006631 is about 100.2205465679.

The spelling of 1006631 in words is "one million, six thousand, six hundred thirty-one".