1201263603 has 16 divisors (see below), whose sum is σ = 1646900640. Its totient is φ = 778512384.

The previous prime is 1201263601. The next prime is 1201263631. The reversal of 1201263603 is 3063621021.

It is a happy number.

It is not a de Polignac number, because 1201263603 - 2¹ = 1201263601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201263601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17326 + ... + 51987.

It is an arithmetic number, because the mean of its divisors is an integer number (102931290).

Almost surely, 2^1201263603 is an apocalyptic number.

1201263603 is a deficient number, since it is larger than the sum of its proper divisors (445637037).

1201263603 is a wasteful number, since it uses less digits than its factorization.

1201263603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69478.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1201263603 is about 34659.2498909021. The cubic root of 1201263603 is about 1063.0314323813.

Adding to 1201263603 its reverse (3063621021), we get a palindrome (4264884624).

The spelling of 1201263603 in words is "one billion, two hundred one million, two hundred sixty-three thousand, six hundred three".