126464821 has 4 divisors (see below), whose sum is σ = 144531232. Its totient is φ = 108398412.

The previous prime is 126464809. The next prime is 126464843. The reversal of 126464821 is 128464621.

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 126464821 - 2²¹ = 124367669 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 (126464801) 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, 9033195 + ... + 9033208.

It is an arithmetic number, because the mean of its divisors is an integer number (36132808).

Almost surely, 2^126464821 is an apocalyptic number.

It is an amenable number.

126464821 is a deficient number, since it is larger than the sum of its proper divisors (18066411).

126464821 is an equidigital number, since it uses as much as digits as its factorization.

126464821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18066410.

The product of its digits is 18432, while the sum is 34.

The square root of 126464821 is about 11245.6578731526. The cubic root of 126464821 is about 501.9455147926.

The spelling of 126464821 in words is "one hundred twenty-six million, four hundred sixty-four thousand, eight hundred twenty-one".