125487813 has 16 divisors (see below), whose sum is σ = 182716416. Its totient is φ = 75974640.

The previous prime is 125487809. The next prime is 125487821. The reversal of 125487813 is 318784521.

It is not a de Polignac number, because 125487813 - 2² = 125487809 is a prime.

It is a super-3 number, since 3×125487813³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125487823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55756 + ... + 57962.

It is an arithmetic number, because the mean of its divisors is an integer number (11419776).

Almost surely, 2^125487813 is an apocalyptic number.

It is an amenable number.

125487813 is a deficient number, since it is larger than the sum of its proper divisors (57228603).

125487813 is a wasteful number, since it uses less digits than its factorization.

125487813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its digits is 53760, while the sum is 39.

The square root of 125487813 is about 11202.1343055687. The cubic root of 125487813 is about 500.6495730775.

The spelling of 125487813 in words is "one hundred twenty-five million, four hundred eighty-seven thousand, eight hundred thirteen".