125541511 has 4 divisors (see below), whose sum is σ = 125585512. Its totient is φ = 125497512.

The previous prime is 125541509. The next prime is 125541517. The reversal of 125541511 is 115145521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125541511 - 2¹ = 125541509 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 (125541517) 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 3 ways as a sum of consecutive naturals, for example, 17400 + ... + 23533.

It is an arithmetic number, because the mean of its divisors is an integer number (31396378).

Almost surely, 2^125541511 is an apocalyptic number.

125541511 is a deficient number, since it is larger than the sum of its proper divisors (44001).

125541511 is an equidigital number, since it uses as much as digits as its factorization.

125541511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44000.

The product of its digits is 1000, while the sum is 25.

The square root of 125541511 is about 11204.5308246263. The cubic root of 125541511 is about 500.7209745584.

The spelling of 125541511 in words is "one hundred twenty-five million, five hundred forty-one thousand, five hundred eleven".