126380917 has 4 divisors (see below), whose sum is σ = 136102540. Its totient is φ = 116659296.

The previous prime is 126380911. The next prime is 126380921. The reversal of 126380917 is 719083621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719083621 = 21269 ⋅33809.

It can be written as a sum of positive squares in 2 ways, for example, as 52867441 + 73513476 = 7271^2 + 8574^2 .

It is not a de Polignac number, because 126380917 - 2¹¹ = 126378869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126380911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4860792 + ... + 4860817.

It is an arithmetic number, because the mean of its divisors is an integer number (34025635).

Almost surely, 2^126380917 is an apocalyptic number.

It is an amenable number.

126380917 is a deficient number, since it is larger than the sum of its proper divisors (9721623).

126380917 is an equidigital number, since it uses as much as digits as its factorization.

126380917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721622.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 126380917 is about 11241.9267476710. The cubic root of 126380917 is about 501.8344837737.

The spelling of 126380917 in words is "one hundred twenty-six million, three hundred eighty thousand, nine hundred seventeen".