1265428575 has 72 divisors (see below), whose sum is σ = 2488934448. Its totient is φ = 635143680.

The previous prime is 1265428547. The next prime is 1265428589. The reversal of 1265428575 is 5758245621.

1265428575 is a `hidden beast` number, since 1 + 2 + 6 + 54 + 28 + 575 = 666.

It is not a de Polignac number, because 1265428575 - 2¹⁰ = 1265427551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1265428575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 97149 + ... + 109401.

It is an arithmetic number, because the mean of its divisors is an integer number (34568534).

Almost surely, 2^1265428575 is an apocalyptic number.

1265428575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265428575 is a deficient number, since it is larger than the sum of its proper divisors (1223505873).

1265428575 is a wasteful number, since it uses less digits than its factorization.

1265428575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295 (or 12278 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 1265428575 is about 35572.8629013747. The cubic root of 1265428575 is about 1081.6312155520.

The spelling of 1265428575 in words is "one billion, two hundred sixty-five million, four hundred twenty-eight thousand, five hundred seventy-five".