1298505 has 16 divisors (see below), whose sum is σ = 2237760. Its totient is φ = 639168.

The previous prime is 1298491. The next prime is 1298537. The reversal of 1298505 is 5058921.

It is not a de Polignac number, because 1298505 - 2⁴ = 1298489 is a prime.

It is a super-2 number, since 2×1298505² = 3372230470050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3135 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (139860).

2^1298505 is an apocalyptic number.

1298505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1298505 is a deficient number, since it is larger than the sum of its proper divisors (939255).

1298505 is a wasteful number, since it uses less digits than its factorization.

1298505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1298505 is about 1139.5196356360. The cubic root of 1298505 is about 109.0974355313.

The spelling of 1298505 in words is "one million, two hundred ninety-eight thousand, five hundred five".