126020173 has 4 divisors (see below), whose sum is σ = 127436220. Its totient is φ = 124604128.

The previous prime is 126020171. The next prime is 126020203. The reversal of 126020173 is 371020621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371020621 = 4231 ⋅87691.

It can be written as a sum of positive squares in 2 ways, for example, as 44262409 + 81757764 = 6653^2 + 9042^2 .

It is a cyclic number.

It is not a de Polignac number, because 126020173 - 2¹ = 126020171 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 (126020171) 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, 707890 + ... + 708067.

It is an arithmetic number, because the mean of its divisors is an integer number (31859055).

Almost surely, 2^126020173 is an apocalyptic number.

It is an amenable number.

126020173 is a deficient number, since it is larger than the sum of its proper divisors (1416047).

126020173 is an equidigital number, since it uses as much as digits as its factorization.

126020173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416046.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 126020173 is about 11225.8707011973. The cubic root of 126020173 is about 501.3565468992.

Adding to 126020173 its reverse (371020621), we get a palindrome (497040794).

The spelling of 126020173 in words is "one hundred twenty-six million, twenty thousand, one hundred seventy-three".