1201042636 has 6 divisors (see below), whose sum is σ = 2101824620. Its totient is φ = 600521316.

The previous prime is 1201042597. The next prime is 1201042669. The reversal of 1201042636 is 6362401021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201042636.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150130326 + ... + 150130333.

Almost surely, 2^1201042636 is an apocalyptic number.

It is an amenable number.

1201042636 is a deficient number, since it is larger than the sum of its proper divisors (900781984).

1201042636 is a wasteful number, since it uses less digits than its factorization.

1201042636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300260663 (or 300260661 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1201042636 is about 34656.0620382640. The cubic root of 1201042636 is about 1062.9662484449.

Adding to 1201042636 its reverse (6362401021), we get a palindrome (7563443657).

The spelling of 1201042636 in words is "one billion, two hundred one million, forty-two thousand, six hundred thirty-six".