1439661 has 8 divisors (see below), whose sum is σ = 1951264. Its totient is φ = 943920.

The previous prime is 1439651. The next prime is 1439663. The reversal of 1439661 is 1669341.

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

It is not a de Polignac number, because 1439661 - 2¹¹ = 1437613 is a prime.

It is an Ulam number.

It is a Duffinian number.

1439661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439663) 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, 3751 + ... + 4116.

It is an arithmetic number, because the mean of its divisors is an integer number (243908).

2^1439661 is an apocalyptic number.

It is an amenable number.

1439661 is a deficient number, since it is larger than the sum of its proper divisors (511603).

1439661 is an equidigital number, since it uses as much as digits as its factorization.

1439661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931.

The product of its digits is 3888, while the sum is 30.

The square root of 1439661 is about 1199.8587416859. The cubic root of 1439661 is about 112.9154613477.

The spelling of 1439661 in words is "one million, four hundred thirty-nine thousand, six hundred sixty-one".