1922138 has 4 divisors (see below), whose sum is σ = 2883210. Its totient is φ = 961068.

The previous prime is 1922119. The next prime is 1922147. The reversal of 1922138 is 8312291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1495729 + 426409 = 1223^2 + 653^2 .

It is a super-2 number, since 2×1922138² = 7389228982088, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 480533 + ... + 480536.

2^1922138 is an apocalyptic number.

1922138 is a deficient number, since it is larger than the sum of its proper divisors (961072).

1922138 is an equidigital number, since it uses as much as digits as its factorization.

1922138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961071.

The product of its digits is 864, while the sum is 26.

The square root of 1922138 is about 1386.4119157018. The cubic root of 1922138 is about 124.3354168963.

The spelling of 1922138 in words is "one million, nine hundred twenty-two thousand, one hundred thirty-eight".