1045661 has 8 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 997920.

The previous prime is 1045651. The next prime is 1045663. The reversal of 1045661 is 1665401.

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 1045661 - 2¹⁴ = 1029277 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 (1045663) 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, 2570 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (136800).

2^1045661 is an apocalyptic number.

It is an amenable number.

1045661 is a deficient number, since it is larger than the sum of its proper divisors (48739).

1045661 is an equidigital number, since it uses as much as digits as its factorization.

1045661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1045661 is about 1022.5756695717. The cubic root of 1045661 is about 101.4994378220.

The spelling of 1045661 in words is "one million, forty-five thousand, six hundred sixty-one".