1298920 has 32 divisors (see below), whose sum is σ = 3340800. Its totient is φ = 445248.

The previous prime is 1298911. The next prime is 1298923. The reversal of 1298920 is 298921.

1298920 = T₈₃ + T₈₄ + ... + T₂₀₂.

It is not an unprimeable number, because it can be changed into a prime (1298923) 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 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 2599.

It is an arithmetic number, because the mean of its divisors is an integer number (104400).

2^1298920 is an apocalyptic number.

1298920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298920 is an abundant number, since it is smaller than the sum of its proper divisors (2041880).

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

1298920 is a wasteful number, since it uses less digits than its factorization.

1298920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657 (or 4653 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1298920 is about 1139.7017153624. The cubic root of 1298920 is about 109.1090567452.

Subtracting from 1298920 its reverse (298921), we obtain a palindrome (999999).

The spelling of 1298920 in words is "one million, two hundred ninety-eight thousand, nine hundred twenty".