125061815 has 4 divisors (see below), whose sum is σ = 150074184. Its totient is φ = 100049448.

The previous prime is 125061779. The next prime is 125061823. The reversal of 125061815 is 518160521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 518160521 = 311 ⋅1666111.

It is a cyclic number.

It is not a de Polignac number, because 125061815 - 2¹² = 125057719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12506177 + ... + 12506186.

It is an arithmetic number, because the mean of its divisors is an integer number (37518546).

Almost surely, 2^125061815 is an apocalyptic number.

125061815 is a deficient number, since it is larger than the sum of its proper divisors (25012369).

125061815 is an equidigital number, since it uses as much as digits as its factorization.

125061815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25012368.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 125061815 is about 11183.1039966550. The cubic root of 125061815 is about 500.0824064176.

The spelling of 125061815 in words is "one hundred twenty-five million, sixty-one thousand, eight hundred fifteen".