125405145 has 16 divisors (see below), whose sum is σ = 222942720. Its totient is φ = 66882672.

The previous prime is 125405129. The next prime is 125405171. The reversal of 125405145 is 541504521.

It is not a de Polignac number, because 125405145 - 2⁴ = 125405129 is a prime.

It is a super-3 number, since 3×125405145³ (a number of 25 digits) contains 333 as substring.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 464329 + ... + 464598.

It is an arithmetic number, because the mean of its divisors is an integer number (13933920).

Almost surely, 2^125405145 is an apocalyptic number.

125405145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125405145 is a deficient number, since it is larger than the sum of its proper divisors (97537575).

125405145 is an equidigital number, since it uses as much as digits as its factorization.

125405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928941 (or 928935 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 125405145 is about 11198.4438651091. The cubic root of 125405145 is about 500.5396107643.

Adding to 125405145 its reverse (541504521), we get a palindrome (666909666).

The spelling of 125405145 in words is "one hundred twenty-five million, four hundred five thousand, one hundred forty-five".