126173451 has 4 divisors (see below), whose sum is σ = 168231272. Its totient is φ = 84115632.

The previous prime is 126173449. The next prime is 126173477. The reversal of 126173451 is 154371621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154371621 = 3 ⋅51457207.

It is not a de Polignac number, because 126173451 - 2¹ = 126173449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126173401) 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 3 ways as a sum of consecutive naturals, for example, 21028906 + ... + 21028911.

It is an arithmetic number, because the mean of its divisors is an integer number (42057818).

Almost surely, 2^126173451 is an apocalyptic number.

126173451 is a deficient number, since it is larger than the sum of its proper divisors (42057821).

126173451 is an equidigital number, since it uses as much as digits as its factorization.

126173451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42057820.

The product of its digits is 5040, while the sum is 30.

The square root of 126173451 is about 11232.6956248267. The cubic root of 126173451 is about 501.5597307540.

The spelling of 126173451 in words is "one hundred twenty-six million, one hundred seventy-three thousand, four hundred fifty-one".