1298020 has 12 divisors (see below), whose sum is σ = 2725884. Its totient is φ = 519200.

The previous prime is 1297993. The next prime is 1298027. The reversal of 1298020 is 208921.

It can be written as a sum of positive squares in 2 ways, for example, as 813604 + 484416 = 902^2 + 696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1297982 and 1298000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32431 + ... + 32470.

It is an arithmetic number, because the mean of its divisors is an integer number (227157).

2^1298020 is an apocalyptic number.

1298020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298020 is an abundant number, since it is smaller than the sum of its proper divisors (1427864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1298020 is a wasteful number, since it uses less digits than its factorization.

1298020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64910 (or 64908 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1298020 is about 1139.3068067909. The cubic root of 1298020 is about 109.0838509743.

The spelling of 1298020 in words is "one million, two hundred ninety-eight thousand, twenty".