1780342 has 8 divisors (see below), whose sum is σ = 2827656. Its totient is φ = 837792.

The previous prime is 1780333. The next prime is 1780349. The reversal of 1780342 is 2430871.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780349) 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, 26148 + ... + 26215.

It is an arithmetic number, because the mean of its divisors is an integer number (353457).

2^1780342 is an apocalyptic number.

1780342 is a deficient number, since it is larger than the sum of its proper divisors (1047314).

1780342 is a wasteful number, since it uses less digits than its factorization.

1780342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52382.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1780342 is about 1334.2945701756. The cubic root of 1780342 is about 121.1995886373.

The spelling of 1780342 in words is "one million, seven hundred eighty thousand, three hundred forty-two".