1265172351 has 12 divisors (see below), whose sum is σ = 1791963912. Its totient is φ = 793833088.

The previous prime is 1265172331. The next prime is 1265172353. The reversal of 1265172351 is 1532715621.

It is not a de Polignac number, because 1265172351 - 2⁶ = 1265172287 is a prime.

It is a super-2 number, since 2×1265172351² = 3201322155469734402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265172353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728760 + ... + 730493.

It is an arithmetic number, because the mean of its divisors is an integer number (149330326).

Almost surely, 2^1265172351 is an apocalyptic number.

1265172351 is a deficient number, since it is larger than the sum of its proper divisors (526791561).

1265172351 is a wasteful number, since it uses less digits than its factorization.

1265172351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459290 (or 1459273 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 1265172351 is about 35569.2613221023. The cubic root of 1265172351 is about 1081.5582077218.

Adding to 1265172351 its reverse (1532715621), we get a palindrome (2797887972).

The spelling of 1265172351 in words is "one billion, two hundred sixty-five million, one hundred seventy-two thousand, three hundred fifty-one".