1915642 has 4 divisors (see below), whose sum is σ = 2873466. Its totient is φ = 957820.

The previous prime is 1915633. The next prime is 1915649. The reversal of 1915642 is 2465191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2465191 = 71 ⋅34721.

It can be written as a sum of positive squares in only one way, i.e., 1366561 + 549081 = 1169^2 + 741^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1915642.

It is not an unprimeable number, because it can be changed into a prime (1915649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478909 + ... + 478912.

2^1915642 is an apocalyptic number.

1915642 is a deficient number, since it is larger than the sum of its proper divisors (957824).

1915642 is an equidigital number, since it uses as much as digits as its factorization.

1915642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957823.

The product of its digits is 2160, while the sum is 28.

The square root of 1915642 is about 1384.0671949006. The cubic root of 1915642 is about 124.1951920609.

The spelling of 1915642 in words is "one million, nine hundred fifteen thousand, six hundred forty-two".