126821375 has 8 divisors (see below), whose sum is σ = 158273232. Its totient is φ = 101457000.

The previous prime is 126821363. The next prime is 126821381. The reversal of 126821375 is 573128621.

It is a happy number.

It is not a de Polignac number, because 126821375 - 2²⁶ = 59712511 is a prime.

It is a super-2 number, since 2×126821375² = 32167322313781250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507161 + ... + 507410.

It is an arithmetic number, because the mean of its divisors is an integer number (19784154).

Almost surely, 2^126821375 is an apocalyptic number.

126821375 is a deficient number, since it is larger than the sum of its proper divisors (31451857).

126821375 is an equidigital number, since it uses as much as digits as its factorization.

126821375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014586 (or 1014576 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 126821375 is about 11261.4996781068. The cubic root of 126821375 is about 502.4167993401.

Adding to 126821375 its reverse (573128621), we get a palindrome (699949996).

The spelling of 126821375 in words is "one hundred twenty-six million, eight hundred twenty-one thousand, three hundred seventy-five".