1298990 has 48 divisors (see below), whose sum is σ = 2979504. Its totient is φ = 403200.

The previous prime is 1298989. The next prime is 1299007. The reversal of 1298990 is 998921.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5270 + ... + 5510.

It is an arithmetic number, because the mean of its divisors is an integer number (62073).

2^1298990 is an apocalyptic number.

1298990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1298990 is an abundant number, since it is smaller than the sum of its proper divisors (1680514).

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

1298990 is a wasteful number, since it uses less digits than its factorization.

1298990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1298990 is about 1139.7324247384. The cubic root of 1298990 is about 109.1110167060. Note that the first 3 decimals are identical.

It can be divided in two parts, 129 and 8990, that added together give a palindrome (9119).

The spelling of 1298990 in words is "one million, two hundred ninety-eight thousand, nine hundred ninety".