125055401 has 2 divisors, whose sum is σ = 125055402. Its totient is φ = 125055400.

The previous prime is 125055323. The next prime is 125055409. The reversal of 125055401 is 104550521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124992400 + 63001 = 11180^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 125055401 - 2¹⁸ = 124793257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125055409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62527700 + 62527701.

It is an arithmetic number, because the mean of its divisors is an integer number (62527701).

Almost surely, 2^125055401 is an apocalyptic number.

It is an amenable number.

125055401 is a deficient number, since it is larger than the sum of its proper divisors (1).

125055401 is an equidigital number, since it uses as much as digits as its factorization.

125055401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125055401 is about 11182.8172210763. The cubic root of 125055401 is about 500.0738570897.

The spelling of 125055401 in words is "one hundred twenty-five million, fifty-five thousand, four hundred one".