1306490 has 8 divisors (see below), whose sum is σ = 2351700. Its totient is φ = 522592.

The previous prime is 1306489. The next prime is 1306499. The reversal of 1306490 is 946031.

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 22801 = 1133^2 + 151^2 .

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

It is a super-2 number, since 2×1306490² = 3413832240200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1306499) 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, 65315 + ... + 65334.

2^1306490 is an apocalyptic number.

1306490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1306490 is a deficient number, since it is larger than the sum of its proper divisors (1045210).

1306490 is a wasteful number, since it uses less digits than its factorization.

1306490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130656.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1306490 is about 1143.0179351174. The cubic root of 1306490 is about 109.3206058785.

The spelling of 1306490 in words is "one million, three hundred six thousand, four hundred ninety".