125138061 has 8 divisors (see below), whose sum is σ = 185389760. Its totient is φ = 83425356.

The previous prime is 125137967. The next prime is 125138077. The reversal of 125138061 is 160831521.

125138061 is a `hidden beast` number, since 12 + 513 + 80 + 61 = 666.

It is not a de Polignac number, because 125138061 - 2²¹ = 123040909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4634743 = 125138061 / (1 + 2 + 5 + 1 + 3 + 8 + 0 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125138861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2317345 + ... + 2317398.

It is an arithmetic number, because the mean of its divisors is an integer number (23173720).

Almost surely, 2^125138061 is an apocalyptic number.

It is an amenable number.

125138061 is a deficient number, since it is larger than the sum of its proper divisors (60251699).

125138061 is an equidigital number, since it uses as much as digits as its factorization.

125138061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634752 (or 4634746 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 125138061 is about 11186.5124592073. The cubic root of 125138061 is about 500.1840136030.

Adding to 125138061 its reverse (160831521), we get a palindrome (285969582).

The spelling of 125138061 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, sixty-one".