125442521413 has 40 divisors (see below), whose sum is σ = 143507145600. Its totient is φ = 109561531200.

The previous prime is 125442521401. The next prime is 125442521459. The reversal of 125442521413 is 314125244521.

It is not a de Polignac number, because 125442521413 - 2⁵ = 125442521381 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125442521473) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40217268 + ... + 40220386.

It is an arithmetic number, because the mean of its divisors is an integer number (3587678640).

Almost surely, 2^125442521413 is an apocalyptic number.

It is an amenable number.

125442521413 is a deficient number, since it is larger than the sum of its proper divisors (18064624187).

125442521413 is an frugal number, since it uses more digits than its factorization.

125442521413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271 (or 3238 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

Adding to 125442521413 its reverse (314125244521), we get a palindrome (439567765934).

The spelling of 125442521413 in words is "one hundred twenty-five billion, four hundred forty-two million, five hundred twenty-one thousand, four hundred thirteen".