1378742 has 8 divisors (see below), whose sum is σ = 2107296. Its totient is φ = 676312.

The previous prime is 1378733. The next prime is 1378759. The reversal of 1378742 is 2478731.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1378699 and 1378708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6398 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (263412).

2^1378742 is an apocalyptic number.

1378742 is a deficient number, since it is larger than the sum of its proper divisors (728554).

1378742 is a wasteful number, since it uses less digits than its factorization.

1378742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062.

The product of its digits is 9408, while the sum is 32.

The square root of 1378742 is about 1174.1984500075. The cubic root of 1378742 is about 111.2997875037.

The spelling of 1378742 in words is "one million, three hundred seventy-eight thousand, seven hundred forty-two".