1245201099 has 4 divisors (see below), whose sum is σ = 1660268136. Its totient is φ = 830134064.

The previous prime is 1245201079. The next prime is 1245201131. The reversal of 1245201099 is 9901025421.

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 1245201099 - 2⁸ = 1245200843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245201079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207533514 + ... + 207533519.

It is an arithmetic number, because the mean of its divisors is an integer number (415067034).

Almost surely, 2^1245201099 is an apocalyptic number.

1245201099 is a deficient number, since it is larger than the sum of its proper divisors (415067037).

1245201099 is an equidigital number, since it uses as much as digits as its factorization.

1245201099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415067036.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1245201099 is about 35287.4070880817. The cubic root of 1245201099 is about 1075.8370546338.

The spelling of 1245201099 in words is "one billion, two hundred forty-five million, two hundred one thousand, ninety-nine".