125206145 has 8 divisors (see below), whose sum is σ = 151796904. Its totient is φ = 99131904.

The previous prime is 125206141. The next prime is 125206171. The reversal of 125206145 is 541602521.

It can be written as a sum of positive squares in 4 ways, for example, as 5456896 + 119749249 = 2336^2 + 10943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125206145 - 2² = 125206141 is a prime.

It is a super-2 number, since 2×125206145² = 31353157491522050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125206141) 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, 128594 + ... + 129563.

It is an arithmetic number, because the mean of its divisors is an integer number (18974613).

Almost surely, 2^125206145 is an apocalyptic number.

It is an amenable number.

125206145 is a deficient number, since it is larger than the sum of its proper divisors (26590759).

125206145 is an equidigital number, since it uses as much as digits as its factorization.

125206145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258259.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 125206145 is about 11189.5551743579. Note that the first 3 decimals coincide. The cubic root of 125206145 is about 500.2747090422.

Adding to 125206145 its reverse (541602521), we get a palindrome (666808666).

The spelling of 125206145 in words is "one hundred twenty-five million, two hundred six thousand, one hundred forty-five".