1916945 has 8 divisors (see below), whose sum is σ = 2316480. Its totient is φ = 1522800.

The previous prime is 1916939. The next prime is 1916951. The reversal of 1916945 is 5496191.

It is an interprime number because it is at equal distance from previous prime (1916939) and next prime (1916951).

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

It is not a de Polignac number, because 1916945 - 2⁶ = 1916881 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515 + ... + 2024.

It is an arithmetic number, because the mean of its divisors is an integer number (289560).

2^1916945 is an apocalyptic number.

It is an amenable number.

1916945 is a deficient number, since it is larger than the sum of its proper divisors (399535).

1916945 is a wasteful number, since it uses less digits than its factorization.

1916945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695.

The product of its digits is 9720, while the sum is 35.

The square root of 1916945 is about 1384.5378290245. The cubic root of 1916945 is about 124.2233444433.

The spelling of 1916945 in words is "one million, nine hundred sixteen thousand, nine hundred forty-five".