1298562720 has 576 divisors, whose sum is σ = 5328239616. Its totient is φ = 263208960.

The previous prime is 1298562709. The next prime is 1298562721. The reversal of 1298562720 is 272658921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298562721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9478492 + ... + 9478628.

It is an arithmetic number, because the mean of its divisors is an integer number (9250416).

Almost surely, 2^1298562720 is an apocalyptic number.

1298562720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298562720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2664119808).

1298562720 is an abundant number, since it is smaller than the sum of its proper divisors (4029676896).

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

1298562720 is a wasteful number, since it uses less digits than its factorization.

1298562720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1298562720 is about 36035.5757550785. The cubic root of 1298562720 is about 1090.9905200833.

The spelling of 1298562720 in words is "one billion, two hundred ninety-eight million, five hundred sixty-two thousand, seven hundred twenty".