1298750423026 has 80 divisors (see below), whose sum is σ = 2330069685048. Its totient is φ = 542574412800.

The previous prime is 1298750423023. The next prime is 1298750423027. The reversal of 1298750423026 is 6203240578921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 758597450625 + 540152972401 = 870975^2 + 734951^2 .

It is a super-2 number, since 2×1298750423026² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1298750423023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 338832006 + ... + 338835838.

It is a 1-persistent number, because it is pandigital, but 2⋅1298750423026 = 2597500846052 is not.

Almost surely, 2^{1298750423026} is an apocalyptic number.

1298750423026 is a deficient number, since it is larger than the sum of its proper divisors (1031319262022).

1298750423026 is an equidigital number, since it uses as much as digits as its factorization.

1298750423026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625 (or 5604 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 1298750423026 in words is "one trillion, two hundred ninety-eight billion, seven hundred fifty million, four hundred twenty-three thousand, twenty-six".