1378242 has 16 divisors (see below), whose sum is σ = 3062880. Its totient is φ = 459396.

The previous prime is 1378231. The next prime is 1378249. The reversal of 1378242 is 2428731.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1378249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12708 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (191430).

2^1378242 is an apocalyptic number.

1378242 is an abundant number, since it is smaller than the sum of its proper divisors (1684638).

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

1378242 is a wasteful number, since it uses less digits than its factorization.

1378242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25534 (or 25528 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1378242 is about 1173.9855195018. The cubic root of 1378242 is about 111.2863316088.

It can be divided in two parts, 13782 and 42, that added together give a cube (13824 = 24³).

The spelling of 1378242 in words is "one million, three hundred seventy-eight thousand, two hundred forty-two".