1298149807 has 4 divisors (see below), whose sum is σ = 1302378616. Its totient is φ = 1293921000.

The previous prime is 1298149799. The next prime is 1298149837. The reversal of 1298149807 is 7089418921.

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

It is a cyclic number.

It is not a de Polignac number, because 1298149807 - 2³ = 1298149799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298149837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2113944 + ... + 2114557.

It is an arithmetic number, because the mean of its divisors is an integer number (325594654).

Almost surely, 2^1298149807 is an apocalyptic number.

1298149807 is a deficient number, since it is larger than the sum of its proper divisors (4228809).

1298149807 is an equidigital number, since it uses as much as digits as its factorization.

1298149807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228808.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 1298149807 is about 36029.8460585110. The cubic root of 1298149807 is about 1090.8748712155.

The spelling of 1298149807 in words is "one billion, two hundred ninety-eight million, one hundred forty-nine thousand, eight hundred seven".