1299245998 has 4 divisors (see below), whose sum is σ = 1948869000. Its totient is φ = 649622998.

The previous prime is 1299245993. The next prime is 1299245999. The reversal of 1299245998 is 8995429921.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299245993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324811498 + ... + 324811501.

It is an arithmetic number, because the mean of its divisors is an integer number (487217250).

Almost surely, 2^1299245998 is an apocalyptic number.

1299245998 is a deficient number, since it is larger than the sum of its proper divisors (649623002).

1299245998 is an equidigital number, since it uses as much as digits as its factorization.

1299245998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649623001.

The product of its digits is 4199040, while the sum is 58.

The square root of 1299245998 is about 36045.0551116238. The cubic root of 1299245998 is about 1091.1818390702.

The spelling of 1299245998 in words is "one billion, two hundred ninety-nine million, two hundred forty-five thousand, nine hundred ninety-eight".