126556541 has 4 divisors (see below), whose sum is σ = 126580284. Its totient is φ = 126532800.

The previous prime is 126556489. The next prime is 126556589. The reversal of 126556541 is 145655621.

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 95140516 + 31416025 = 9754^2 + 5605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126556541 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 (126556141) 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, 251 + ... + 15911.

It is an arithmetic number, because the mean of its divisors is an integer number (31645071).

Almost surely, 2^126556541 is an apocalyptic number.

It is an amenable number.

126556541 is a deficient number, since it is larger than the sum of its proper divisors (23743).

126556541 is an equidigital number, since it uses as much as digits as its factorization.

126556541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23742.

The product of its digits is 36000, while the sum is 35.

The square root of 126556541 is about 11249.7351524380. The cubic root of 126556541 is about 502.0668326336.

The spelling of 126556541 in words is "one hundred twenty-six million, five hundred fifty-six thousand, five hundred forty-one".