1919427 has 8 divisors (see below), whose sum is σ = 2641920. Its totient is φ = 1238280.

The previous prime is 1919387. The next prime is 1919429. The reversal of 1919427 is 7249191.

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

It is not a de Polignac number, because 1919427 - 2⁶ = 1919363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919429) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10227 + ... + 10412.

It is an arithmetic number, because the mean of its divisors is an integer number (330240).

2^1919427 is an apocalyptic number.

1919427 is a deficient number, since it is larger than the sum of its proper divisors (722493).

1919427 is a wasteful number, since it uses less digits than its factorization.

1919427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20673.

The product of its digits is 4536, while the sum is 33.

The square root of 1919427 is about 1385.4338670611. The cubic root of 1919427 is about 124.2769348120.

It can be divided in two parts, 1919 and 427, that added together give a triangular number (2346 = T₆₈).

The spelling of 1919427 in words is "one million, nine hundred nineteen thousand, four hundred twenty-seven".