125638273 has 4 divisors (see below), whose sum is σ = 129033940. Its totient is φ = 122242608.

The previous prime is 125638231. The next prime is 125638297. The reversal of 125638273 is 372836521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66471409 + 59166864 = 8153^2 + 7692^2 .

It is a cyclic number.

It is not a de Polignac number, because 125638273 - 2²⁵ = 92083841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 3395629 = 125638273 / (1 + 2 + 5 + 6 + 3 + 8 + 2 + 7 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125638573) 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, 1697778 + ... + 1697851.

It is an arithmetic number, because the mean of its divisors is an integer number (32258485).

Almost surely, 2^125638273 is an apocalyptic number.

It is an amenable number.

125638273 is a deficient number, since it is larger than the sum of its proper divisors (3395667).

125638273 is an equidigital number, since it uses as much as digits as its factorization.

125638273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395666.

The product of its digits is 60480, while the sum is 37.

The square root of 125638273 is about 11208.8479782715. The cubic root of 125638273 is about 500.8495862554.

The spelling of 125638273 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, two hundred seventy-three".