125021003 has 2 divisors, whose sum is σ = 125021004. Its totient is φ = 125021002.

The previous prime is 125020999. The next prime is 125021023. The reversal of 125021003 is 300120521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125021003 - 2² = 125020999 is a prime.

It is a super-2 number, since 2×125021003² = 31260502382252018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62510501 + 62510502.

It is an arithmetic number, because the mean of its divisors is an integer number (62510502).

Almost surely, 2^125021003 is an apocalyptic number.

125021003 is a deficient number, since it is larger than the sum of its proper divisors (1).

125021003 is an equidigital number, since it uses as much as digits as its factorization.

125021003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 125021003 is about 11181.2791307614. The cubic root of 125021003 is about 500.0280024317.

Adding to 125021003 its reverse (300120521), we get a palindrome (425141524).

The spelling of 125021003 in words is "one hundred twenty-five million, twenty-one thousand, three".