1489905 has 24 divisors (see below), whose sum is σ = 2614248. Its totient is φ = 784896.

The previous prime is 1489903. The next prime is 1489909. The reversal of 1489905 is 5099841.

It can be written as a sum of positive squares in 4 ways, for example, as 106929 + 1382976 = 327^2 + 1176^2 .

It is not a de Polignac number, because 1489905 - 2¹ = 1489903 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1489905.

It is not an unprimeable number, because it can be changed into a prime (1489903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4939 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (108927).

2^1489905 is an apocalyptic number.

1489905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1489905 is a deficient number, since it is larger than the sum of its proper divisors (1124343).

1489905 is a wasteful number, since it uses less digits than its factorization.

1489905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1489905 is about 1220.6166474369. The cubic root of 1489905 is about 114.2140484474.

The spelling of 1489905 in words is "one million, four hundred eighty-nine thousand, nine hundred five".