125161131 has 4 divisors (see below), whose sum is σ = 166881512. Its totient is φ = 83440752.

The previous prime is 125161117. The next prime is 125161133. The reversal of 125161131 is 131161521.

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: 131161521 = 3 ⋅43720507.

It is not a de Polignac number, because 125161131 - 2⁶ = 125161067 is a prime.

It is a super-2 number, since 2×125161131² = 31330617426398322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125161098 and 125161107.

It is not an unprimeable number, because it can be changed into a prime (125161133) 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, 20860186 + ... + 20860191.

It is an arithmetic number, because the mean of its divisors is an integer number (41720378).

Almost surely, 2^125161131 is an apocalyptic number.

125161131 is a deficient number, since it is larger than the sum of its proper divisors (41720381).

125161131 is an equidigital number, since it uses as much as digits as its factorization.

125161131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41720380.

The product of its digits is 180, while the sum is 21.

The square root of 125161131 is about 11187.5435641610. The cubic root of 125161131 is about 500.2147490858.

The spelling of 125161131 in words is "one hundred twenty-five million, one hundred sixty-one thousand, one hundred thirty-one".