115721436 has 12 divisors (see below), whose sum is σ = 270016712. Its totient is φ = 38573808.

The previous prime is 115721429. The next prime is 115721443. The reversal of 115721436 is 634127511.

It is an interprime number because it is at equal distance from previous prime (115721429) and next prime (115721443).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4821715 + ... + 4821738.

Almost surely, 2^115721436 is an apocalyptic number.

It is an amenable number.

115721436 is an abundant number, since it is smaller than the sum of its proper divisors (154295276).

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

115721436 is a wasteful number, since it uses less digits than its factorization.

115721436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643460 (or 9643458 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 115721436 is about 10757.3898321108. The cubic root of 115721436 is about 487.3091934415.

Adding to 115721436 its reverse (634127511), we get a palindrome (749848947).

The spelling of 115721436 in words is "one hundred fifteen million, seven hundred twenty-one thousand, four hundred thirty-six".