1265232730 has 16 divisors (see below), whose sum is σ = 2289222504. Its totient is φ = 503470080.

The previous prime is 1265232719. The next prime is 1265232751. The reversal of 1265232730 is 372325621.

It can be written as a sum of positive squares in 4 ways, for example, as 583657281 + 681575449 = 24159^2 + 26107^2 .

It is a super-2 number, since 2×1265232730² = 3201627722126505800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1265232692 and 1265232701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325851 + ... + 329710.

Almost surely, 2^1265232730 is an apocalyptic number.

1265232730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265232730 is a deficient number, since it is larger than the sum of its proper divisors (1023989774).

1265232730 is a wasteful number, since it uses less digits than its factorization.

1265232730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655761.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 1265232730 is about 35570.1100644909. The cubic root of 1265232730 is about 1081.5754128517.

The spelling of 1265232730 in words is "one billion, two hundred sixty-five million, two hundred thirty-two thousand, seven hundred thirty".