125019005 has 4 divisors (see below), whose sum is σ = 150022812. Its totient is φ = 100015200.

The previous prime is 125018987. The next prime is 125019023. The reversal of 125019005 is 500910521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (125018987) and next prime (125019023).

It can be written as a sum of positive squares in 2 ways, for example, as 90421081 + 34597924 = 9509^2 + 5882^2 .

It is not a de Polignac number, because 125019005 - 2¹⁶ = 124953469 is a prime.

It is a super-2 number, since 2×125019005² = 31259503222380050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12501896 + ... + 12501905.

It is an arithmetic number, because the mean of its divisors is an integer number (37505703).

Almost surely, 2^125019005 is an apocalyptic number.

It is an amenable number.

125019005 is a deficient number, since it is larger than the sum of its proper divisors (25003807).

125019005 is an equidigital number, since it uses as much as digits as its factorization.

125019005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25003806.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 125019005 is about 11181.1897846338. The cubic root of 125019005 is about 500.0253387159.

Adding to 125019005 its reverse (500910521), we get a palindrome (625929526).

The spelling of 125019005 in words is "one hundred twenty-five million, nineteen thousand, five".