126921375 has 96 divisors (see below), whose sum is σ = 266333184. Its totient is φ = 56952000.

The previous prime is 126921341. The next prime is 126921401. The reversal of 126921375 is 573129621.

126921375 is a `hidden beast` number, since 1 + 269 + 21 + 375 = 666.

It is not a de Polignac number, because 126921375 - 2⁷ = 126921247 is a prime.

It is a super-2 number, since 2×126921375² = 32218070863781250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 559012 + ... + 559238.

It is an arithmetic number, because the mean of its divisors is an integer number (2774304).

Almost surely, 2^126921375 is an apocalyptic number.

126921375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126921375 is an abundant number, since it is smaller than the sum of its proper divisors (139411809).

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

126921375 is a wasteful number, since it uses less digits than its factorization.

126921375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 313 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 126921375 is about 11265.9387092244. The cubic root of 126921375 is about 502.5488183060.

The spelling of 126921375 in words is "one hundred twenty-six million, nine hundred twenty-one thousand, three hundred seventy-five".