126443521 has 8 divisors (see below), whose sum is σ = 130644800. Its totient is φ = 122299632.

The previous prime is 126443507. The next prime is 126443533. The reversal of 126443521 is 125344621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126443521 is a prime.

It is a super-3 number, since 3×126443521³ (a number of 25 digits) contains 333 as substring.

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 126443521.

It is not an unprimeable number, because it can be changed into a prime (126443921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9846 + ... + 18703.

It is an arithmetic number, because the mean of its divisors is an integer number (16330600).

Almost surely, 2^126443521 is an apocalyptic number.

It is an amenable number.

126443521 is a deficient number, since it is larger than the sum of its proper divisors (4201279).

126443521 is a wasteful number, since it uses less digits than its factorization.

126443521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28695.

The product of its digits is 5760, while the sum is 28.

The square root of 126443521 is about 11244.7108010833. The cubic root of 126443521 is about 501.9173329376.

The spelling of 126443521 in words is "one hundred twenty-six million, four hundred forty-three thousand, five hundred twenty-one".