126873421 has 4 divisors (see below), whose sum is σ = 130966144. Its totient is φ = 122780700.

The previous prime is 126873419. The next prime is 126873433. The reversal of 126873421 is 124378621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126873421 - 2¹ = 126873419 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 (126873401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046315 + ... + 2046376.

It is an arithmetic number, because the mean of its divisors is an integer number (32741536).

Almost surely, 2^126873421 is an apocalyptic number.

It is an amenable number.

126873421 is a deficient number, since it is larger than the sum of its proper divisors (4092723).

126873421 is an equidigital number, since it uses as much as digits as its factorization.

126873421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092722.

The product of its digits is 16128, while the sum is 34.

The square root of 126873421 is about 11263.8102345521. The cubic root of 126873421 is about 502.4855185880.

The spelling of 126873421 in words is "one hundred twenty-six million, eight hundred seventy-three thousand, four hundred twenty-one".