126401273 has 4 divisors (see below), whose sum is σ = 133836660. Its totient is φ = 118965888.

The previous prime is 126401263. The next prime is 126401279. The reversal of 126401273 is 372104621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58553104 + 67848169 = 7652^2 + 8237^2 .

It is a cyclic number.

It is not a de Polignac number, because 126401273 - 2²⁴ = 109624057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126401279) 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, 3717668 + ... + 3717701.

It is an arithmetic number, because the mean of its divisors is an integer number (33459165).

Almost surely, 2^126401273 is an apocalyptic number.

It is an amenable number.

126401273 is a deficient number, since it is larger than the sum of its proper divisors (7435387).

126401273 is an equidigital number, since it uses as much as digits as its factorization.

126401273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7435386.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 126401273 is about 11242.8320720359. The cubic root of 126401273 is about 501.8614255900.

Adding to 126401273 its reverse (372104621), we get a palindrome (498505894).

The spelling of 126401273 in words is "one hundred twenty-six million, four hundred one thousand, two hundred seventy-three".