1298745 has 72 divisors (see below), whose sum is σ = 2845440. Its totient is φ = 544320.

The previous prime is 1298723. The next prime is 1298747. The reversal of 1298745 is 5478921.

It is not a de Polignac number, because 1298745 - 2⁷ = 1298617 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298747) 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 71 ways as a sum of consecutive naturals, for example, 41880 + ... + 41910.

It is an arithmetic number, because the mean of its divisors is an integer number (39520).

2^1298745 is an apocalyptic number.

1298745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1298745 is an abundant number, since it is smaller than the sum of its proper divisors (1546695).

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

1298745 is a wasteful number, since it uses less digits than its factorization.

1298745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 65 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1298745 is about 1139.6249383021. The cubic root of 1298745 is about 109.1041565352.

The spelling of 1298745 in words is "one million, two hundred ninety-eight thousand, seven hundred forty-five".