125012405 has 16 divisors (see below), whose sum is σ = 171642240. Its totient is φ = 85624512.

The previous prime is 125012401. The next prime is 125012431. The reversal of 125012405 is 504210521.

It is a cyclic number.

It is not a de Polignac number, because 125012405 - 2² = 125012401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125012401) 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, 42647 + ... + 45483.

It is an arithmetic number, because the mean of its divisors is an integer number (10727640).

Almost surely, 2^125012405 is an apocalyptic number.

It is an amenable number.

125012405 is a deficient number, since it is larger than the sum of its proper divisors (46629835).

125012405 is a wasteful number, since it uses less digits than its factorization.

125012405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 125012405 is about 11180.8946422010. The cubic root of 125012405 is about 500.0165394529.

Adding to 125012405 its reverse (504210521), we get a palindrome (629222926).

The spelling of 125012405 in words is "one hundred twenty-five million, twelve thousand, four hundred five".