1390441 has 4 divisors (see below), whose sum is σ = 1497412. Its totient is φ = 1283472.

The previous prime is 1390421. The next prime is 1390457. The reversal of 1390441 is 1440931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1440931 = 239 ⋅6029.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 1201216 = 435^2 + 1096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390441 - 2⁵ = 1390409 is a prime.

It is a Duffinian number.

1390441 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1390421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53466 + ... + 53491.

It is an arithmetic number, because the mean of its divisors is an integer number (374353).

2^1390441 is an apocalyptic number.

It is an amenable number.

1390441 is a deficient number, since it is larger than the sum of its proper divisors (106971).

1390441 is a wasteful number, since it uses less digits than its factorization.

1390441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106970.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1390441 is about 1179.1696230823. The cubic root of 1390441 is about 111.6137042475.

The spelling of 1390441 in words is "one million, three hundred ninety thousand, four hundred forty-one".