1331265770 has 8 divisors (see below), whose sum is σ = 2396278404. Its totient is φ = 532506304.

The previous prime is 1331265757. The next prime is 1331265773. The reversal of 1331265770 is 775621331.

It can be written as a sum of positive squares in 2 ways, for example, as 1191009121 + 140256649 = 34511^2 + 11843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1331265770.

It is not an unprimeable number, because it can be changed into a prime (1331265773) 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, 66563279 + ... + 66563298.

Almost surely, 2^1331265770 is an apocalyptic number.

1331265770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331265770 is a deficient number, since it is larger than the sum of its proper divisors (1065012634).

1331265770 is a wasteful number, since it uses less digits than its factorization.

1331265770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133126584.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 1331265770 is about 36486.5149061951. The cubic root of 1331265770 is about 1100.0732100035.

The spelling of 1331265770 in words is "one billion, three hundred thirty-one million, two hundred sixty-five thousand, seven hundred seventy".