1401665 has 8 divisors (see below), whose sum is σ = 1736448. Its totient is φ = 1085040.

The previous prime is 1401641. The next prime is 1401679. The reversal of 1401665 is 5661041.

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

It is not a de Polignac number, because 1401665 - 2⁶ = 1401601 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 1401665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4367 + ... + 4676.

It is an arithmetic number, because the mean of its divisors is an integer number (217056).

2^1401665 is an apocalyptic number.

It is an amenable number.

1401665 is a deficient number, since it is larger than the sum of its proper divisors (334783).

1401665 is an equidigital number, since it uses as much as digits as its factorization.

1401665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079.

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

The square root of 1401665 is about 1183.9193384686. The cubic root of 1401665 is about 111.9132246648.

The spelling of 1401665 in words is "one million, four hundred one thousand, six hundred sixty-five".