1298009412 has 90 divisors (see below), whose sum is σ = 3827953038. Its totient is φ = 370835136.

The previous prime is 1298009357. The next prime is 1298009413. The reversal of 1298009412 is 2149008921.

It can be written as a sum of positive squares in only one way, i.e., 1026946116 + 271063296 = 32046^2 + 16464^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1298009413) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 78928 + ... + 93944.

Almost surely, 2^1298009412 is an apocalyptic number.

1298009412 is a gapful number since it is divisible by the number (12) 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 1298009412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1913976519).

1298009412 is an abundant number, since it is smaller than the sum of its proper divisors (2529943626).

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

1298009412 is a wasteful number, since it uses less digits than its factorization.

1298009412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15055 (or 15029 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1298009412 is about 36027.8976905398. The cubic root of 1298009412 is about 1090.8355437311.

The spelling of 1298009412 in words is "one billion, two hundred ninety-eight million, nine thousand, four hundred twelve".