126565541 has 4 divisors (see below), whose sum is σ = 130929900. Its totient is φ = 122201184.

The previous prime is 126565531. The next prime is 126565547. The reversal of 126565541 is 145565621.

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 69789316 + 56776225 = 8354^2 + 7535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126565541 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 (126565547) 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, 2182136 + ... + 2182193.

It is an arithmetic number, because the mean of its divisors is an integer number (32732475).

Almost surely, 2^126565541 is an apocalyptic number.

It is an amenable number.

126565541 is a deficient number, since it is larger than the sum of its proper divisors (4364359).

126565541 is an equidigital number, since it uses as much as digits as its factorization.

126565541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364358.

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

The square root of 126565541 is about 11250.1351547437. The cubic root of 126565541 is about 502.0787337553.

The spelling of 126565541 in words is "one hundred twenty-six million, five hundred sixty-five thousand, five hundred forty-one".