125540013 has 8 divisors (see below), whose sum is σ = 170130976. Its totient is φ = 82321200.

The previous prime is 125539993. The next prime is 125540021. The reversal of 125540013 is 310045521.

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

It is not a de Polignac number, because 125540013 - 2⁹ = 125539501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125540083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342823 + ... + 343188.

It is an arithmetic number, because the mean of its divisors is an integer number (21266372).

Almost surely, 2^125540013 is an apocalyptic number.

It is an amenable number.

125540013 is a deficient number, since it is larger than the sum of its proper divisors (44590963).

125540013 is an equidigital number, since it uses as much as digits as its factorization.

125540013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686075.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 125540013 is about 11204.4639764694. The cubic root of 125540013 is about 500.7189829648.

Adding to 125540013 its reverse (310045521), we get a palindrome (435585534).

The spelling of 125540013 in words is "one hundred twenty-five million, five hundred forty thousand, thirteen".