1671138 has 32 divisors (see below), whose sum is σ = 4245120. Its totient is φ = 477360.

The previous prime is 1671133. The next prime is 1671139. The reversal of 1671138 is 8311761.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1671133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1833 + ... + 2588.

It is an arithmetic number, because the mean of its divisors is an integer number (132660).

2^1671138 is an apocalyptic number.

1671138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1671138 is an abundant number, since it is smaller than the sum of its proper divisors (2573982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1671138 is a wasteful number, since it uses less digits than its factorization.

1671138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439 (or 4433 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 1671138 is about 1292.7250287668. The cubic root of 1671138 is about 118.6690425116.

Adding to 1671138 its reverse (8311761), we get a palindrome (9982899).

The spelling of 1671138 in words is "one million, six hundred seventy-one thousand, one hundred thirty-eight".