125740161 has 16 divisors (see below), whose sum is σ = 187329600. Its totient is φ = 83355264.

The previous prime is 125740141. The next prime is 125740187. The reversal of 125740161 is 161047521.

It is a happy number.

125740161 is a `hidden beast` number, since 1 + 257 + 401 + 6 + 1 = 666.

It is not a de Polignac number, because 125740161 - 2²⁵ = 92185729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125740141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 17841.

It is an arithmetic number, because the mean of its divisors is an integer number (11708100).

Almost surely, 2^125740161 is an apocalyptic number.

It is an amenable number.

125740161 is a deficient number, since it is larger than the sum of its proper divisors (61589439).

125740161 is a wasteful number, since it uses less digits than its factorization.

125740161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26205 (or 26199 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 125740161 is about 11213.3920380944. The cubic root of 125740161 is about 500.9849398463.

Adding to 125740161 its reverse (161047521), we get a palindrome (286787682).

The spelling of 125740161 in words is "one hundred twenty-five million, seven hundred forty thousand, one hundred sixty-one".