126821377 has 8 divisors (see below), whose sum is σ = 134424576. Its totient is φ = 119234112.

The previous prime is 126821363. The next prime is 126821381. The reversal of 126821377 is 773128621.

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 126821377 - 2¹⁹ = 126297089 is a prime.

It is a super-2 number, since 2×126821377² = 32167323328352258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126821327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15048 + ... + 21910.

It is an arithmetic number, because the mean of its divisors is an integer number (16803072).

Almost surely, 2^126821377 is an apocalyptic number.

126821377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126821377 is a deficient number, since it is larger than the sum of its proper divisors (7603199).

126821377 is a wasteful number, since it uses less digits than its factorization.

126821377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7967.

The product of its digits is 28224, while the sum is 37.

The square root of 126821377 is about 11261.4997669049. The cubic root of 126821377 is about 502.4168019812.

Adding to 126821377 its reverse (773128621), we get a palindrome (899949998).

The spelling of 126821377 in words is "one hundred twenty-six million, eight hundred twenty-one thousand, three hundred seventy-seven".