125515103 has 8 divisors (see below), whose sum is σ = 148392480. Its totient is φ = 103874400.

The previous prime is 125515081. The next prime is 125515109. The reversal of 125515103 is 301515521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125515103 - 2²⁰ = 124466527 is a prime.

It is a super-2 number, since 2×125515103² = 31508082162201218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125515109) 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 in 7 ways as a sum of consecutive naturals, for example, 308948 + ... + 309353.

It is an arithmetic number, because the mean of its divisors is an integer number (18549060).

Almost surely, 2^125515103 is an apocalyptic number.

125515103 is a deficient number, since it is larger than the sum of its proper divisors (22877377).

125515103 is an equidigital number, since it uses as much as digits as its factorization.

125515103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618337.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 125515103 is about 11203.3523108041. The cubic root of 125515103 is about 500.6858627544.

The spelling of 125515103 in words is "one hundred twenty-five million, five hundred fifteen thousand, one hundred three".