125205401 has 2 divisors, whose sum is σ = 125205402. Its totient is φ = 125205400.

The previous prime is 125205389. The next prime is 125205403. The reversal of 125205401 is 104502521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 10394176 = 10715^2 + 3224^2 .

It is an emirp because it is prime and its reverse (104502521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125205401 - 2¹⁰ = 125204377 is a prime.

Together with 125205403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125205403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62602700 + 62602701.

It is an arithmetic number, because the mean of its divisors is an integer number (62602701).

Almost surely, 2^125205401 is an apocalyptic number.

It is an amenable number.

125205401 is a deficient number, since it is larger than the sum of its proper divisors (1).

125205401 is an equidigital number, since it uses as much as digits as its factorization.

125205401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 125205401 is about 11189.5219290191. The cubic root of 125205401 is about 500.2737181294.

Adding to 125205401 its reverse (104502521), we get a palindrome (229707922).

The spelling of 125205401 in words is "one hundred twenty-five million, two hundred five thousand, four hundred one".