1284490 has 8 divisors (see below), whose sum is σ = 2312100. Its totient is φ = 513792.

The previous prime is 1284487. The next prime is 1284511. The reversal of 1284490 is 944821.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 5329 = 1131^2 + 73^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64215 + ... + 64234.

2^1284490 is an apocalyptic number.

1284490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1284490 is a deficient number, since it is larger than the sum of its proper divisors (1027610).

1284490 is a wasteful number, since it uses less digits than its factorization.

1284490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128456.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1284490 is about 1133.3534311943. The cubic root of 1284490 is about 108.7035120809.

It can be divided in two parts, 12844 and 90, that multiplied together give a triangular number (1155960 = T₁₅₂₀).

The spelling of 1284490 in words is "one million, two hundred eighty-four thousand, four hundred ninety".