125620221 has 4 divisors (see below), whose sum is σ = 167493632. Its totient is φ = 83746812.

The previous prime is 125620219. The next prime is 125620249. The reversal of 125620221 is 122026521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122026521 = 3 ⋅40675507.

It is not a de Polignac number, because 125620221 - 2¹ = 125620219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125620321) 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, 20936701 + ... + 20936706.

It is an arithmetic number, because the mean of its divisors is an integer number (41873408).

Almost surely, 2^125620221 is an apocalyptic number.

It is an amenable number.

125620221 is a deficient number, since it is larger than the sum of its proper divisors (41873411).

125620221 is an equidigital number, since it uses as much as digits as its factorization.

125620221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41873410.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 125620221 is about 11208.0426926382. The cubic root of 125620221 is about 500.8255973610.

Adding to 125620221 its reverse (122026521), we get a palindrome (247646742).

The spelling of 125620221 in words is "one hundred twenty-five million, six hundred twenty thousand, two hundred twenty-one".