1380042 has 24 divisors (see below), whose sum is σ = 3061344. Its totient is φ = 449064.

The previous prime is 1380031. The next prime is 1380047. The reversal of 1380042 is 2400831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1379997 and 1380024.

It is not an unprimeable number, because it can be changed into a prime (1380047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (127556).

2^1380042 is an apocalyptic number.

1380042 is an abundant number, since it is smaller than the sum of its proper divisors (1681302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1380042 is a wasteful number, since it uses less digits than its factorization.

1380042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1380042 is about 1174.7518886982. The cubic root of 1380042 is about 111.3347576122.

Adding to 1380042 its reverse (2400831), we get a palindrome (3780873).

The spelling of 1380042 in words is "one million, three hundred eighty thousand, forty-two".