1440155 has 8 divisors (see below), whose sum is σ = 1829952. Its totient is φ = 1084288.

The previous prime is 1440119. The next prime is 1440203. The reversal of 1440155 is 5510441.

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 1440155 - 2¹⁶ = 1374619 is a prime.

It is a Duffinian number.

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, 8387 + ... + 8556.

It is an arithmetic number, because the mean of its divisors is an integer number (228744).

2^1440155 is an apocalyptic number.

1440155 is a deficient number, since it is larger than the sum of its proper divisors (389797).

1440155 is a wasteful number, since it uses less digits than its factorization.

1440155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16965.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1440155 is about 1200.0645815955. The cubic root of 1440155 is about 112.9283750033.

Adding to 1440155 its reverse (5510441), we get a palindrome (6950596).

The spelling of 1440155 in words is "one million, four hundred forty thousand, one hundred fifty-five".