1377986 has 8 divisors (see below), whose sum is σ = 2188620. Its totient is φ = 648448.

The previous prime is 1377983. The next prime is 1378001. The reversal of 1377986 is 6897731.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 235225 = 1069^2 + 485^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1377983) 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, 20231 + ... + 20298.

2^1377986 is an apocalyptic number.

1377986 is a deficient number, since it is larger than the sum of its proper divisors (810634).

1377986 is a wasteful number, since it uses less digits than its factorization.

1377986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40548.

The product of its digits is 63504, while the sum is 41.

The square root of 1377986 is about 1173.8764841328. The cubic root of 1377986 is about 111.2794409309.

The spelling of 1377986 in words is "one million, three hundred seventy-seven thousand, nine hundred eighty-six".