1378069 has 12 divisors (see below), whose sum is σ = 1732192. Its totient is φ = 1073160.

The previous prime is 1378067. The next prime is 1378073. The reversal of 1378069 is 9608731.

1378069 = 7² + 8² + ... + 160².

It is not a de Polignac number, because 1378069 - 2¹ = 1378067 is a prime.

It is a super-2 number, since 2×1378069² = 3798148337522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378061) 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, 34 + ... + 1660.

2^1378069 is an apocalyptic number.

It is an amenable number.

1378069 is a deficient number, since it is larger than the sum of its proper divisors (354123).

1378069 is a wasteful number, since it uses less digits than its factorization.

1378069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1645 counting only the distinct ones).

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

The square root of 1378069 is about 1173.9118365533. The cubic root of 1378069 is about 111.2816751114.

The spelling of 1378069 in words is "one million, three hundred seventy-eight thousand, sixty-nine".