126911521 has 8 divisors (see below), whose sum is σ = 141061824. Its totient is φ = 113196720.

The previous prime is 126911513. The next prime is 126911531. The reversal of 126911521 is 125119621.

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

It is a cyclic number.

It is not a de Polignac number, because 126911521 - 2³ = 126911513 is a prime.

It is a super-2 number, since 2×126911521² = 32213068325066882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126911521.

It is not an unprimeable number, because it can be changed into a prime (126911501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108261 + ... + 109426.

It is an arithmetic number, because the mean of its divisors is an integer number (17632728).

Almost surely, 2^126911521 is an apocalyptic number.

126911521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126911521 is a deficient number, since it is larger than the sum of its proper divisors (14150303).

126911521 is a wasteful number, since it uses less digits than its factorization.

126911521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217751.

The product of its digits is 1080, while the sum is 28.

The square root of 126911521 is about 11265.5013647862. The cubic root of 126911521 is about 502.5358122377.

The spelling of 126911521 in words is "one hundred twenty-six million, nine hundred eleven thousand, five hundred twenty-one".