1298649 has 32 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 714560.

The previous prime is 1298641. The next prime is 1298651. The reversal of 1298649 is 9468921.

It is not a de Polignac number, because 1298649 - 2³ = 1298641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1298641) 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 31 ways as a sum of consecutive naturals, for example, 21982 + ... + 22040.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2^1298649 is an apocalyptic number.

It is an amenable number.

1298649 is a deficient number, since it is larger than the sum of its proper divisors (774951).

1298649 is a wasteful number, since it uses less digits than its factorization.

1298649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125.

The product of its digits is 31104, while the sum is 39.

The square root of 1298649 is about 1139.5828184033. The cubic root of 1298649 is about 109.1014682330.

It can be divided in two parts, 129 and 8649, that added together give a palindrome (8778).

The spelling of 1298649 in words is "one million, two hundred ninety-eight thousand, six hundred forty-nine".