1212145603 has 8 divisors (see below), whose sum is σ = 1276949520. Its totient is φ = 1147442400.

The previous prime is 1212145591. The next prime is 1212145633. The reversal of 1212145603 is 3065412121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212145603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212145633) 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 7 ways as a sum of consecutive naturals, for example, 201 + ... + 49237.

It is an arithmetic number, because the mean of its divisors is an integer number (159618690).

Almost surely, 2^1212145603 is an apocalyptic number.

1212145603 is a deficient number, since it is larger than the sum of its proper divisors (64803917).

1212145603 is a wasteful number, since it uses less digits than its factorization.

1212145603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50357.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1212145603 is about 34815.8814767054. The cubic root of 1212145603 is about 1066.2317159058.

Adding to 1212145603 its reverse (3065412121), we get a palindrome (4277557724).

The spelling of 1212145603 in words is "one billion, two hundred twelve million, one hundred forty-five thousand, six hundred three".