125506403 has 24 divisors (see below), whose sum is σ = 145938240. Its totient is φ = 107676800.

The previous prime is 125506391. The next prime is 125506411. The reversal of 125506403 is 304605521.

It is not a de Polignac number, because 125506403 - 2¹⁶ = 125440867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125506103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164543 + ... + 165303.

It is an arithmetic number, because the mean of its divisors is an integer number (6080760).

Almost surely, 2^125506403 is an apocalyptic number.

125506403 is a deficient number, since it is larger than the sum of its proper divisors (20431837).

125506403 is a wasteful number, since it uses less digits than its factorization.

125506403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 125506403 is about 11202.9640274349. The cubic root of 125506403 is about 500.6742942458.

The spelling of 125506403 in words is "one hundred twenty-five million, five hundred six thousand, four hundred three".