126352621 has 4 divisors (see below), whose sum is σ = 130428544. Its totient is φ = 122276700.

The previous prime is 126352609. The next prime is 126352627. The reversal of 126352621 is 126253621.

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 126352621 - 2¹¹ = 126350573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126352621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126352627) 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, 2037915 + ... + 2037976.

It is an arithmetic number, because the mean of its divisors is an integer number (32607136).

Almost surely, 2^126352621 is an apocalyptic number.

It is an amenable number.

126352621 is a deficient number, since it is larger than the sum of its proper divisors (4075923).

126352621 is an equidigital number, since it uses as much as digits as its factorization.

126352621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075922.

The product of its digits is 4320, while the sum is 28.

The square root of 126352621 is about 11240.6681740900. The cubic root of 126352621 is about 501.7970283076.

The spelling of 126352621 in words is "one hundred twenty-six million, three hundred fifty-two thousand, six hundred twenty-one".