1212601516 has 12 divisors (see below), whose sum is σ = 2425203088. Its totient is φ = 519686352.

The previous prime is 1212601501. The next prime is 1212601543. The reversal of 1212601516 is 6151062121.

It is a happy number.

1212601516 is an admirable number.

It is an unprimeable number.

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, 21653571 + ... + 21653626.

Almost surely, 2^1212601516 is an apocalyptic number.

It is an amenable number.

1212601516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212601516 is a wasteful number, since it uses less digits than its factorization.

1212601516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43307208 (or 43307206 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1212601516 is about 34822.4283472592. The cubic root of 1212601516 is about 1066.3653764074.

Adding to 1212601516 its reverse (6151062121), we get a palindrome (7363663637).

The spelling of 1212601516 in words is "one billion, two hundred twelve million, six hundred one thousand, five hundred sixteen".