1298289742 has 8 divisors (see below), whose sum is σ = 1988869536. Its totient is φ = 635333232.

The previous prime is 1298289709. The next prime is 1298289761. The reversal of 1298289742 is 2479828921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1298289742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6905703 + ... + 6905890.

It is an arithmetic number, because the mean of its divisors is an integer number (248608692).

Almost surely, 2^1298289742 is an apocalyptic number.

1298289742 is a deficient number, since it is larger than the sum of its proper divisors (690579794).

1298289742 is a wasteful number, since it uses less digits than its factorization.

1298289742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13811642.

The product of its digits is 1161216, while the sum is 52.

The square root of 1298289742 is about 36031.7879378751. The cubic root of 1298289742 is about 1090.9140670232.

The spelling of 1298289742 in words is "one billion, two hundred ninety-eight million, two hundred eighty-nine thousand, seven hundred forty-two".