126545621 has 8 divisors (see below), whose sum is σ = 127960800. Its totient is φ = 125135280.

The previous prime is 126545561. The next prime is 126545623.

126545621 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 126545621 - 2¹⁸ = 126283477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126545623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79766 + ... + 81336.

It is an arithmetic number, because the mean of its divisors is an integer number (15995100).

Almost surely, 2^126545621 is an apocalyptic number.

It is an amenable number.

126545621 is a deficient number, since it is larger than the sum of its proper divisors (1415179).

126545621 is a wasteful number, since it uses less digits than its factorization.

126545621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419.

The product of its digits is 14400, while the sum is 32.

The square root of 126545621 is about 11249.2497972087. The cubic root of 126545621 is about 502.0523918483.

The spelling of 126545621 in words is "one hundred twenty-six million, five hundred forty-five thousand, six hundred twenty-one".