125555603 has 2 divisors, whose sum is σ = 125555604. Its totient is φ = 125555602.

The previous prime is 125555567. The next prime is 125555609. The reversal of 125555603 is 306555521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125555603 - 2¹⁸ = 125293459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125555603.

It is not a weakly prime, because it can be changed into another prime (125555609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62777801 + 62777802.

It is an arithmetic number, because the mean of its divisors is an integer number (62777802).

Almost surely, 2^125555603 is an apocalyptic number.

125555603 is a deficient number, since it is larger than the sum of its proper divisors (1).

125555603 is an equidigital number, since it uses as much as digits as its factorization.

125555603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 125555603 is about 11205.1596597282. The cubic root of 125555603 is about 500.7397091212.

The spelling of 125555603 in words is "one hundred twenty-five million, five hundred fifty-five thousand, six hundred three".