1938201 has 4 divisors (see below), whose sum is σ = 2584272. Its totient is φ = 1292132.

The previous prime is 1938199. The next prime is 1938203. The reversal of 1938201 is 1028391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1938199) and next prime (1938203).

It is a cyclic number.

It is not a de Polignac number, because 1938201 - 2¹ = 1938199 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1938203) 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 3 ways as a sum of consecutive naturals, for example, 323031 + ... + 323036.

It is an arithmetic number, because the mean of its divisors is an integer number (646068).

2^1938201 is an apocalyptic number.

1938201 is the 881-st centered pentagonal number.

It is an amenable number.

1938201 is a deficient number, since it is larger than the sum of its proper divisors (646071).

1938201 is an equidigital number, since it uses as much as digits as its factorization.

1938201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646070.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1938201 is about 1392.1928745688. The cubic root of 1938201 is about 124.6808069535.

The spelling of 1938201 in words is "one million, nine hundred thirty-eight thousand, two hundred one".