1819742 has 8 divisors (see below), whose sum is σ = 2737800. Its totient is φ = 907144.

The previous prime is 1819739. The next prime is 1819747. The reversal of 1819742 is 2479181.

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

It is a super-2 number, since 2×1819742² = 6622921893128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1819699 and 1819708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392 + ... + 1947.

It is an arithmetic number, because the mean of its divisors is an integer number (342225).

2^1819742 is an apocalyptic number.

1819742 is a deficient number, since it is larger than the sum of its proper divisors (918058).

1819742 is a wasteful number, since it uses less digits than its factorization.

1819742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730.

The product of its digits is 4032, while the sum is 32.

The square root of 1819742 is about 1348.9781317723. The cubic root of 1819742 is about 122.0871454764.

The spelling of 1819742 in words is "one million, eight hundred nineteen thousand, seven hundred forty-two".