126534919 has 4 divisors (see below), whose sum is σ = 144611344. Its totient is φ = 108458496.

The previous prime is 126534913. The next prime is 126534943. The reversal of 126534919 is 919435621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919435621 = 13 ⋅70725817.

It is a cyclic number.

It is not a de Polignac number, because 126534919 - 2⁵ = 126534887 is a prime.

It is a super-4 number, since 4×126534919⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126534913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9038202 + ... + 9038215.

It is an arithmetic number, because the mean of its divisors is an integer number (36152836).

Almost surely, 2^126534919 is an apocalyptic number.

126534919 is a deficient number, since it is larger than the sum of its proper divisors (18076425).

126534919 is an equidigital number, since it uses as much as digits as its factorization.

126534919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18076424.

The product of its digits is 58320, while the sum is 40.

The square root of 126534919 is about 11248.7741109865. The cubic root of 126534919 is about 502.0382385437.

The spelling of 126534919 in words is "one hundred twenty-six million, five hundred thirty-four thousand, nine hundred nineteen".