1298731240 has 32 divisors (see below), whose sum is σ = 2937461760. Its totient is φ = 516769600.

The previous prime is 1298731229. The next prime is 1298731243. The reversal of 1298731240 is 421378921.

It is a self number, because there is not a number n which added to its sum of digits gives 1298731240.

It is not an unprimeable number, because it can be changed into a prime (1298731243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77356 + ... + 92635.

It is an arithmetic number, because the mean of its divisors is an integer number (91795680).

Almost surely, 2^1298731240 is an apocalyptic number.

1298731240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298731240 is an abundant number, since it is smaller than the sum of its proper divisors (1638730520).

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

1298731240 is a wasteful number, since it uses less digits than its factorization.

1298731240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170193 (or 170189 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1298731240 is about 36037.9139240883. The cubic root of 1298731240 is about 1091.0377121999.

The spelling of 1298731240 in words is "one billion, two hundred ninety-eight million, seven hundred thirty-one thousand, two hundred forty".