126120523 has 4 divisors (see below), whose sum is σ = 131604048. Its totient is φ = 120637000.

The previous prime is 126120517. The next prime is 126120541. The reversal of 126120523 is 325021621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325021621 = 1493 ⋅217697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126120523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126120494 and 126120503.

It is not an unprimeable number, because it can be changed into a prime (126120503) 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, 2741728 + ... + 2741773.

It is an arithmetic number, because the mean of its divisors is an integer number (32901012).

Almost surely, 2^126120523 is an apocalyptic number.

126120523 is a deficient number, since it is larger than the sum of its proper divisors (5483525).

126120523 is an equidigital number, since it uses as much as digits as its factorization.

126120523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483524.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 126120523 is about 11230.3393982551. The cubic root of 126120523 is about 501.4895885119.

The spelling of 126120523 in words is "one hundred twenty-six million, one hundred twenty thousand, five hundred twenty-three".