125451005 has 4 divisors (see below), whose sum is σ = 150541212. Its totient is φ = 100360800.

The previous prime is 125450999. The next prime is 125451019. The reversal of 125451005 is 500154521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500154521 = 1553 ⋅322057.

It can be written as a sum of positive squares in 2 ways, for example, as 85026841 + 40424164 = 9221^2 + 6358^2 .

It is not a de Polignac number, because 125451005 - 2²⁰ = 124402429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12545096 + ... + 12545105.

It is an arithmetic number, because the mean of its divisors is an integer number (37635303).

Almost surely, 2^125451005 is an apocalyptic number.

It is an amenable number.

125451005 is a deficient number, since it is larger than the sum of its proper divisors (25090207).

125451005 is an equidigital number, since it uses as much as digits as its factorization.

125451005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25090206.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125451005 is about 11200.4912838679. The cubic root of 125451005 is about 500.6006182266.

The spelling of 125451005 in words is "one hundred twenty-five million, four hundred fifty-one thousand, five".