125128603 has 2 divisors, whose sum is σ = 125128604. Its totient is φ = 125128602.

The previous prime is 125128589. The next prime is 125128607. The reversal of 125128603 is 306821521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125128603 - 2¹⁷ = 124997531 is a prime.

It is not a weakly prime, because it can be changed into another prime (125128607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62564301 + 62564302.

It is an arithmetic number, because the mean of its divisors is an integer number (62564302).

Almost surely, 2^125128603 is an apocalyptic number.

125128603 is a deficient number, since it is larger than the sum of its proper divisors (1).

125128603 is an equidigital number, since it uses as much as digits as its factorization.

125128603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 125128603 is about 11186.0897099925. The cubic root of 125128603 is about 500.1714118959.

It can be divided in two parts, 12512 and 8603, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 125128603 in words is "one hundred twenty-five million, one hundred twenty-eight thousand, six hundred three".