1047661 has 4 divisors (see below), whose sum is σ = 1054492. Its totient is φ = 1040832.

The previous prime is 1047653. The next prime is 1047667. The reversal of 1047661 is 1667401.

It is a happy number.

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 145161 + 902500 = 381^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1047661 - 2³ = 1047653 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 (1047667) 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, 3180 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (263623).

2^1047661 is an apocalyptic number.

It is an amenable number.

1047661 is a deficient number, since it is larger than the sum of its proper divisors (6831).

1047661 is an equidigital number, since it uses as much as digits as its factorization.

1047661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1047661 is about 1023.5531251479. The cubic root of 1047661 is about 101.5641081087.

The spelling of 1047661 in words is "one million, forty-seven thousand, six hundred sixty-one".