1401789 has 8 divisors (see below), whose sum is σ = 1929472. Its totient is φ = 904320.

The previous prime is 1401767. The next prime is 1401791. The reversal of 1401789 is 9871041.

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

It is not a de Polignac number, because 1401789 - 2¹⁵ = 1369021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401739) 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 7 ways as a sum of consecutive naturals, for example, 7444 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (241184).

2^1401789 is an apocalyptic number.

It is an amenable number.

1401789 is a deficient number, since it is larger than the sum of its proper divisors (527683).

1401789 is a wasteful number, since it uses less digits than its factorization.

1401789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15107.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1401789 is about 1183.9717057430. The cubic root of 1401789 is about 111.9165247474.

The spelling of 1401789 in words is "one million, four hundred one thousand, seven hundred eighty-nine".