125504081 has 4 divisors (see below), whose sum is σ = 132886692. Its totient is φ = 118121472.

The previous prime is 125504069. The next prime is 125504173. The reversal of 125504081 is 180405521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180405521 = 4973 ⋅36277.

It can be written as a sum of positive squares in 2 ways, for example, as 54523456 + 70980625 = 7384^2 + 8425^2 .

It is a cyclic number.

It is not a de Polignac number, because 125504081 - 2²² = 121309777 is a prime.

It is a super-2 number, since 2×125504081² = 31502548695309122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125504081.

It is not an unprimeable number, because it can be changed into a prime (125504011) 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, 3691280 + ... + 3691313.

It is an arithmetic number, because the mean of its divisors is an integer number (33221673).

Almost surely, 2^125504081 is an apocalyptic number.

It is an amenable number.

125504081 is a deficient number, since it is larger than the sum of its proper divisors (7382611).

125504081 is an equidigital number, since it uses as much as digits as its factorization.

125504081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382610.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 125504081 is about 11202.8603936673. The cubic root of 125504081 is about 500.6712065603.

The spelling of 125504081 in words is "one hundred twenty-five million, five hundred four thousand, eighty-one".