1305490 has 16 divisors (see below), whose sum is σ = 2473920. Its totient is φ = 494640.

The previous prime is 1305449. The next prime is 1305511. The reversal of 1305490 is 945031.

1305490 = T₁₁₆ + T₁₁₇ + ... + T₂₁₀.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246 + ... + 3625.

It is an arithmetic number, because the mean of its divisors is an integer number (154620).

2^1305490 is an apocalyptic number.

1305490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305490 is a deficient number, since it is larger than the sum of its proper divisors (1168430).

1305490 is a wasteful number, since it uses less digits than its factorization.

1305490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6897.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1305490 is about 1142.5804129251. The cubic root of 1305490 is about 109.2927070785.

The spelling of 1305490 in words is "one million, three hundred five thousand, four hundred ninety".