1265725147 has 4 divisors (see below), whose sum is σ = 1332342280. Its totient is φ = 1199108016.

The previous prime is 1265725117. The next prime is 1265725151. The reversal of 1265725147 is 7415275621.

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-1265725147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265725117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33308538 + ... + 33308575.

It is an arithmetic number, because the mean of its divisors is an integer number (333085570).

Almost surely, 2^1265725147 is an apocalyptic number.

1265725147 is a deficient number, since it is larger than the sum of its proper divisors (66617133).

1265725147 is an equidigital number, since it uses as much as digits as its factorization.

1265725147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66617132.

The product of its digits is 117600, while the sum is 40.

The square root of 1265725147 is about 35577.0311718108. The cubic root of 1265725147 is about 1081.7157077371.

The spelling of 1265725147 in words is "one billion, two hundred sixty-five million, seven hundred twenty-five thousand, one hundred forty-seven".