125813047 has 4 divisors (see below), whose sum is σ = 126037080. Its totient is φ = 125589016.

The previous prime is 125813021. The next prime is 125813063. The reversal of 125813047 is 740318521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125813047 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 (125813147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111172 + ... + 112297.

It is an arithmetic number, because the mean of its divisors is an integer number (31509270).

Almost surely, 2^125813047 is an apocalyptic number.

125813047 is a deficient number, since it is larger than the sum of its proper divisors (224033).

125813047 is an equidigital number, since it uses as much as digits as its factorization.

125813047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224032.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 125813047 is about 11216.6415205265. The cubic root of 125813047 is about 501.0817207395.

The spelling of 125813047 in words is "one hundred twenty-five million, eight hundred thirteen thousand, forty-seven".