1039661 has 8 divisors (see below), whose sum is σ = 1250880. Its totient is φ = 844128.

The previous prime is 1039657. The next prime is 1039667. The reversal of 1039661 is 1669301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1039661 - 2² = 1039657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1039661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1039667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3776 + ... + 4041.

It is an arithmetic number, because the mean of its divisors is an integer number (156360).

2^1039661 is an apocalyptic number.

It is an amenable number.

1039661 is a deficient number, since it is larger than the sum of its proper divisors (211219).

1039661 is an equidigital number, since it uses as much as digits as its factorization.

1039661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1039661 is about 1019.6376807474. The cubic root of 1039661 is about 101.3049308191.

The spelling of 1039661 in words is "one million, thirty-nine thousand, six hundred sixty-one".