1920872 has 8 divisors (see below), whose sum is σ = 3601650. Its totient is φ = 960432.

The previous prime is 1920859. The next prime is 1920883. The reversal of 1920872 is 2780291.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 948676 = 986^2 + 974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120047 + ... + 120062.

2^1920872 is an apocalyptic number.

It is an amenable number.

1920872 is a deficient number, since it is larger than the sum of its proper divisors (1680778).

1920872 is a wasteful number, since it uses less digits than its factorization.

1920872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240115 (or 240111 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1920872 is about 1385.9552662334. The cubic root of 1920872 is about 124.3081134094.

It can be divided in two parts, 19208 and 72, that multiplied together give a square (1382976 = 1176²).

The spelling of 1920872 in words is "one million, nine hundred twenty thousand, eight hundred seventy-two".