1381995 has 32 divisors (see below), whose sum is σ = 2548800. Its totient is φ = 709632.

The previous prime is 1381993. The next prime is 1381997. The reversal of 1381995 is 5991831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1381993) and next prime (1381997).

It is not a de Polignac number, because 1381995 - 2¹ = 1381993 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1381993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3739 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (79650).

2^1381995 is an apocalyptic number.

1381995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1381995 is a deficient number, since it is larger than the sum of its proper divisors (1166805).

1381995 is a wasteful number, since it uses less digits than its factorization.

1381995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1381995 is about 1175.5828341721. The cubic root of 1381995 is about 111.3872522203.

The spelling of 1381995 in words is "one million, three hundred eighty-one thousand, nine hundred ninety-five".