1405489 has 4 divisors (see below), whose sum is σ = 1423360. Its totient is φ = 1387620.

The previous prime is 1405477. The next prime is 1405493. The reversal of 1405489 is 9845041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9845041 = 491 ⋅20051.

It is a cyclic number.

It is not a de Polignac number, because 1405489 - 2⁷ = 1405361 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405489.

It is not an unprimeable number, because it can be changed into a prime (1405289) 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, 8817 + ... + 8974.

It is an arithmetic number, because the mean of its divisors is an integer number (355840).

2^1405489 is an apocalyptic number.

It is an amenable number.

1405489 is a deficient number, since it is larger than the sum of its proper divisors (17871).

1405489 is an equidigital number, since it uses as much as digits as its factorization.

1405489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17870.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1405489 is about 1185.5332133686. The cubic root of 1405489 is about 112.0149055417.

The spelling of 1405489 in words is "one million, four hundred five thousand, four hundred eighty-nine".