125953505 has 4 divisors (see below), whose sum is σ = 151144212. Its totient is φ = 100762800.

The previous prime is 125953481. The next prime is 125953507. The reversal of 125953505 is 505359521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505359521 = 43 ⋅11752547.

It can be written as a sum of positive squares in 2 ways, for example, as 94458961 + 31494544 = 9719^2 + 5612^2 .

It is not a de Polignac number, because 125953505 - 2⁶ = 125953441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125953507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12595346 + ... + 12595355.

It is an arithmetic number, because the mean of its divisors is an integer number (37786053).

Almost surely, 2^125953505 is an apocalyptic number.

It is an amenable number.

125953505 is a deficient number, since it is larger than the sum of its proper divisors (25190707).

125953505 is an equidigital number, since it uses as much as digits as its factorization.

125953505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25190706.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 125953505 is about 11222.9009173208. The cubic root of 125953505 is about 501.2681210191.

The spelling of 125953505 in words is "one hundred twenty-five million, nine hundred fifty-three thousand, five hundred five".