126343621 has 4 divisors (see below), whose sum is σ = 126434700. Its totient is φ = 126252544.

The previous prime is 126343619. The next prime is 126343639.

126343621 is nontrivially palindromic in base 10.

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 13771521 + 112572100 = 3711^2 + 10610^2 .

It is a cyclic number.

It is not a de Polignac number, because 126343621 - 2¹ = 126343619 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 126343621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126343601) 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, 43426 + ... + 46243.

It is an arithmetic number, because the mean of its divisors is an integer number (31608675).

Almost surely, 2^126343621 is an apocalyptic number.

It is an amenable number.

126343621 is a deficient number, since it is larger than the sum of its proper divisors (91079).

126343621 is an equidigital number, since it uses as much as digits as its factorization.

126343621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91078.

The product of its digits is 5184, while the sum is 28.

The square root of 126343621 is about 11240.2678348872. The cubic root of 126343621 is about 501.7851138193.

The spelling of 126343621 in words is "one hundred twenty-six million, three hundred forty-three thousand, six hundred twenty-one".