1490805 has 28 divisors (see below), whose sum is σ = 2688780. Its totient is φ = 793152.

The previous prime is 1490789. The next prime is 1490807. The reversal of 1490805 is 5080941.

It can be written as a sum of positive squares in 2 ways, for example, as 998001 + 492804 = 999^2 + 702^2 .

It is not a de Polignac number, because 1490805 - 2⁴ = 1490789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1490805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490807) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3441 + ... + 3849.

2^1490805 is an apocalyptic number.

1490805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1490805 is a deficient number, since it is larger than the sum of its proper divisors (1197975).

1490805 is an frugal number, since it uses more digits than its factorization.

1490805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1490805 is about 1220.9852578963. The cubic root of 1490805 is about 114.2370414017.

The spelling of 1490805 in words is "one million, four hundred ninety thousand, eight hundred five".