1265000172 has 12 divisors (see below), whose sum is σ = 2951667096. Its totient is φ = 421666720.

The previous prime is 1265000147. The next prime is 1265000173. The reversal of 1265000172 is 2710005621.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1265000173) 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, 52708329 + ... + 52708352.

It is an arithmetic number, because the mean of its divisors is an integer number (245972258).

Almost surely, 2^1265000172 is an apocalyptic number.

1265000172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265000172 is an abundant number, since it is smaller than the sum of its proper divisors (1686666924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265000172 is a wasteful number, since it uses less digits than its factorization.

1265000172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105416688 (or 105416686 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1265000172 is about 35566.8409055401. The cubic root of 1265000172 is about 1081.5091419275.

Adding to 1265000172 its reverse (2710005621), we get a palindrome (3975005793).

The spelling of 1265000172 in words is "one billion, two hundred sixty-five million, one hundred seventy-two", and thus it is an aban number.