125275421 has 8 divisors (see below), whose sum is σ = 127199160. Its totient is φ = 123363328.

The previous prime is 125275399. The next prime is 125275429. The reversal of 125275421 is 124572521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 81252196 + 44023225 = 9014^2 + 6635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125275421 - 2⁶ = 125275357 is a prime.

It is a super-2 number, since 2×125275421² = 31387862213454482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125275429) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20135 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (15899895).

Almost surely, 2^125275421 is an apocalyptic number.

It is an amenable number.

125275421 is a deficient number, since it is larger than the sum of its proper divisors (1923739).

125275421 is an equidigital number, since it uses as much as digits as its factorization.

125275421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823.

The product of its digits is 5600, while the sum is 29.

The square root of 125275421 is about 11192.6503117001. The cubic root of 125275421 is about 500.3669586169.

The spelling of 125275421 in words is "one hundred twenty-five million, two hundred seventy-five thousand, four hundred twenty-one".