125531611 has 4 divisors (see below), whose sum is σ = 125818000. Its totient is φ = 125245224.

The previous prime is 125531579. The next prime is 125531641. The reversal of 125531611 is 116135521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116135521 = 61 ⋅1903861.

It is a cyclic number.

It is not a de Polignac number, because 125531611 - 2⁵ = 125531579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125531641) 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, 142536 + ... + 143413.

It is an arithmetic number, because the mean of its divisors is an integer number (31454500).

Almost surely, 2^125531611 is an apocalyptic number.

125531611 is a deficient number, since it is larger than the sum of its proper divisors (286389).

125531611 is an equidigital number, since it uses as much as digits as its factorization.

125531611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286388.

The product of its digits is 900, while the sum is 25.

The square root of 125531611 is about 11204.0890303496. The cubic root of 125531611 is about 500.7078121976.

The spelling of 125531611 in words is "one hundred twenty-five million, five hundred thirty-one thousand, six hundred eleven".