1298499705740 has 24 divisors (see below), whose sum is σ = 2726878614432. Its totient is φ = 519394314240.

The previous prime is 1298499705719. The next prime is 1298499705743. The reversal of 1298499705740 is 475079948921.

It is a super-2 number, since 2×1298499705740² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1298499705743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927025 + ... + 2512055.

It is an arithmetic number, because the mean of its divisors is an integer number (113619942268).

Almost surely, 2^{1298499705740} is an apocalyptic number.

1298499705740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298499705740 is an abundant number, since it is smaller than the sum of its proper divisors (1428378908692).

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

1298499705740 is a wasteful number, since it uses less digits than its factorization.

1298499705740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696017 (or 696015 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 65.

The spelling of 1298499705740 in words is "one trillion, two hundred ninety-eight billion, four hundred ninety-nine million, seven hundred five thousand, seven hundred forty".