1298727144 has 288 divisors, whose sum is σ = 4302754560. Its totient is φ = 350438400.

The previous prime is 1298727139. The next prime is 1298727163. The reversal of 1298727144 is 4417278921.

It is a self number, because there is not a number n which added to its sum of digits gives 1298727144.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4149132 + ... + 4149444.

It is an arithmetic number, because the mean of its divisors is an integer number (14940120).

Almost surely, 2^1298727144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298727144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151377280).

1298727144 is an abundant number, since it is smaller than the sum of its proper divisors (3004027416).

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

1298727144 is a wasteful number, since it uses less digits than its factorization.

1298727144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 373 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1298727144 is about 36037.8570950050. The cubic root of 1298727144 is about 1091.0365652099.

The spelling of 1298727144 in words is "one billion, two hundred ninety-eight million, seven hundred twenty-seven thousand, one hundred forty-four".