1245198099 has 16 divisors (see below), whose sum is σ = 1771355520. Its totient is φ = 775332480.

The previous prime is 1245198083. The next prime is 1245198107. The reversal of 1245198099 is 9908915421.

It is not a de Polignac number, because 1245198099 - 2⁴ = 1245198083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245198029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86509 + ... + 99870.

It is an arithmetic number, because the mean of its divisors is an integer number (110709720).

Almost surely, 2^1245198099 is an apocalyptic number.

1245198099 is a deficient number, since it is larger than the sum of its proper divisors (526157421).

1245198099 is a wasteful number, since it uses less digits than its factorization.

1245198099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186530.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 1245198099 is about 35287.3645799739. The cubic root of 1245198099 is about 1075.8361906465.

The spelling of 1245198099 in words is "one billion, two hundred forty-five million, one hundred ninety-eight thousand, ninety-nine".