1380986 has 4 divisors (see below), whose sum is σ = 2071482. Its totient is φ = 690492.

The previous prime is 1380983. The next prime is 1380997. The reversal of 1380986 is 6890831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6890831 = 17 ⋅405343.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 361 = 1175^2 + 19^2 .

It is not an unprimeable number, because it can be changed into a prime (1380983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345245 + ... + 345248.

2^1380986 is an apocalyptic number.

1380986 is a deficient number, since it is larger than the sum of its proper divisors (690496).

1380986 is an equidigital number, since it uses as much as digits as its factorization.

1380986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690495.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1380986 is about 1175.1536069808. The cubic root of 1380986 is about 111.3601375297.

The spelling of 1380986 in words is "one million, three hundred eighty thousand, nine hundred eighty-six".