125220481 has 4 divisors (see below), whose sum is σ = 125245764. Its totient is φ = 125195200.

The previous prime is 125220449. The next prime is 125220497. The reversal of 125220481 is 184022521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184022521 = 79 ⋅2329399.

It can be written as a sum of positive squares in 2 ways, for example, as 116316225 + 8904256 = 10785^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 125220481 - 2⁵ = 125220449 is a prime.

It is a super-2 number, since 2×125220481² = 31360337723742722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125220421) 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, 2500 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (31311441).

Almost surely, 2^125220481 is an apocalyptic number.

It is an amenable number.

125220481 is a deficient number, since it is larger than the sum of its proper divisors (25283).

125220481 is an equidigital number, since it uses as much as digits as its factorization.

125220481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 125220481 is about 11190.1957534263. The cubic root of 125220481 is about 500.2938019936.

The spelling of 125220481 in words is "one hundred twenty-five million, two hundred twenty thousand, four hundred eighty-one".