1029661 has 4 divisors (see below), whose sum is σ = 1039392. Its totient is φ = 1019932.

The previous prime is 1029653. The next prime is 1029689. The reversal of 1029661 is 1669201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1029661 - 2³ = 1029653 is a prime.

It is a Duffinian number.

1029661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705 + ... + 4918.

It is an arithmetic number, because the mean of its divisors is an integer number (259848).

2^1029661 is an apocalyptic number.

It is an amenable number.

1029661 is a deficient number, since it is larger than the sum of its proper divisors (9731).

1029661 is an equidigital number, since it uses as much as digits as its factorization.

1029661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9730.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1029661 is about 1014.7221294522. The cubic root of 1029661 is about 100.9790826859.

The spelling of 1029661 in words is "one million, twenty-nine thousand, six hundred sixty-one".