125557403 has 2 divisors, whose sum is σ = 125557404. Its totient is φ = 125557402.

The previous prime is 125557363. The next prime is 125557429. The reversal of 125557403 is 304755521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125557403 - 2⁸ = 125557147 is a prime.

It is a super-2 number, since 2×125557403² = 31529322896208818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125557403.

It is not a weakly prime, because it can be changed into another prime (125557303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62778701 + 62778702.

It is an arithmetic number, because the mean of its divisors is an integer number (62778702).

Almost surely, 2^125557403 is an apocalyptic number.

125557403 is a deficient number, since it is larger than the sum of its proper divisors (1).

125557403 is an equidigital number, since it uses as much as digits as its factorization.

125557403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 125557403 is about 11205.2399795810. The cubic root of 125557403 is about 500.7421020243.

The spelling of 125557403 in words is "one hundred twenty-five million, five hundred fifty-seven thousand, four hundred three".