1912138 has 8 divisors (see below), whose sum is σ = 2877732. Its totient is φ = 952896.

The previous prime is 1912133. The next prime is 1912139. The reversal of 1912138 is 8312191.

It can be written as a sum of positive squares in 2 ways, for example, as 1595169 + 316969 = 1263^2 + 563^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912133) 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, 745 + ... + 2092.

2^1912138 is an apocalyptic number.

1912138 is a deficient number, since it is larger than the sum of its proper divisors (965594).

1912138 is a wasteful number, since it uses less digits than its factorization.

1912138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176.

The product of its digits is 432, while the sum is 25.

The square root of 1912138 is about 1382.8007810238. The cubic root of 1912138 is about 124.1194218910.

The spelling of 1912138 in words is "one million, nine hundred twelve thousand, one hundred thirty-eight".