1878122 has 4 divisors (see below), whose sum is σ = 2817186. Its totient is φ = 939060.

The previous prime is 1878119. The next prime is 1878139. The reversal of 1878122 is 2218781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2218781 = 229 ⋅9689.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 919681 = 979^2 + 959^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469529 + ... + 469532.

2^1878122 is an apocalyptic number.

1878122 is a deficient number, since it is larger than the sum of its proper divisors (939064).

1878122 is an equidigital number, since it uses as much as digits as its factorization.

1878122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939063.

The product of its digits is 1792, while the sum is 29.

The square root of 1878122 is about 1370.4459128328. The cubic root of 1878122 is about 123.3790058911.

The spelling of 1878122 in words is "one million, eight hundred seventy-eight thousand, one hundred twenty-two".