1380769 has 4 divisors (see below), whose sum is σ = 1486996. Its totient is φ = 1274544.

The previous prime is 1380763. The next prime is 1380779. The reversal of 1380769 is 9670831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 1166400 = 463^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380769 - 2¹¹ = 1378721 is a prime.

It is a super-2 number, since 2×1380769² = 3813046062722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380763) 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, 53094 + ... + 53119.

It is an arithmetic number, because the mean of its divisors is an integer number (371749).

2^1380769 is an apocalyptic number.

It is an amenable number.

1380769 is a deficient number, since it is larger than the sum of its proper divisors (106227).

1380769 is a wasteful number, since it uses less digits than its factorization.

1380769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106226.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1380769 is about 1175.0612749980. The cubic root of 1380769 is about 111.3543043990.

The spelling of 1380769 in words is "one million, three hundred eighty thousand, seven hundred sixty-nine".