1245985203 has 32 divisors (see below), whose sum is σ = 1772144640. Its totient is φ = 777288960.

The previous prime is 1245985193. The next prime is 1245985217. The reversal of 1245985203 is 3025895421.

It is not a de Polignac number, because 1245985203 - 2⁵ = 1245985171 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1245985303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580350 + ... + 582492.

It is an arithmetic number, because the mean of its divisors is an integer number (55379520).

Almost surely, 2^1245985203 is an apocalyptic number.

1245985203 is a deficient number, since it is larger than the sum of its proper divisors (526159437).

1245985203 is a wasteful number, since it uses less digits than its factorization.

1245985203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1245985203 is about 35298.5155920189. The cubic root of 1245985203 is about 1076.0628256988.

The spelling of 1245985203 in words is "one billion, two hundred forty-five million, nine hundred eighty-five thousand, two hundred three".