1641938 has 4 divisors (see below), whose sum is σ = 2462910. Its totient is φ = 820968.

The previous prime is 1641931. The next prime is 1641953. The reversal of 1641938 is 8391461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8391461 = 13 ⋅645497.

It can be written as a sum of positive squares in only one way, i.e., 1471369 + 170569 = 1213^2 + 413^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1641931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410483 + ... + 410486.

2^1641938 is an apocalyptic number.

1641938 is a deficient number, since it is larger than the sum of its proper divisors (820972).

1641938 is an equidigital number, since it uses as much as digits as its factorization.

1641938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820971.

The product of its digits is 5184, while the sum is 32.

The square root of 1641938 is about 1281.3812859567. The cubic root of 1641938 is about 117.9738043929.

The spelling of 1641938 in words is "one million, six hundred forty-one thousand, nine hundred thirty-eight".