125544145 has 12 divisors (see below), whose sum is σ = 154843164. Its totient is φ = 97715520.

The previous prime is 125544137. The next prime is 125544149. The reversal of 125544145 is 541445521.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2954961 + 122589184 = 1719^2 + 11072^2 .

It is not a de Polignac number, because 125544145 - 2³ = 125544137 is a prime.

It is a super-2 number, since 2×125544145² = 31522664687562050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125544149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2326 + ... + 16015.

It is an arithmetic number, because the mean of its divisors is an integer number (12903597).

Almost surely, 2^125544145 is an apocalyptic number.

It is an amenable number.

125544145 is a deficient number, since it is larger than the sum of its proper divisors (29299019).

125544145 is an equidigital number, since it uses as much as digits as its factorization.

125544145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18420 (or 18383 counting only the distinct ones).

The product of its digits is 16000, while the sum is 31.

The square root of 125544145 is about 11204.6483657454. The cubic root of 125544145 is about 500.7244764275.

Adding to 125544145 its reverse (541445521), we get a palindrome (666989666).

The spelling of 125544145 in words is "one hundred twenty-five million, five hundred forty-four thousand, one hundred forty-five".