1440081 has 6 divisors (see below), whose sum is σ = 2080130. Its totient is φ = 960048.

The previous prime is 1440079. The next prime is 1440107. The reversal of 1440081 is 1800441.

It can be written as a sum of positive squares in only one way, i.e., 1440000 + 81 = 1200^2 + 9^2 .

It is not a de Polignac number, because 1440081 - 2¹ = 1440079 is a prime.

It is a super-2 number, since 2×1440081² = 4147666573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79996 + ... + 80013.

2^1440081 is an apocalyptic number.

It is an amenable number.

1440081 is a deficient number, since it is larger than the sum of its proper divisors (640049).

1440081 is a wasteful number, since it uses less digits than its factorization.

1440081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160015 (or 160012 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1440081 is about 1200.0337495254. The cubic root of 1440081 is about 112.9264407571.

It can be divided in two parts, 14400 and 81, that multiplied together give a square (1166400 = 1080²).

The spelling of 1440081 in words is "one million, four hundred forty thousand, eighty-one".