1378506 has 8 divisors (see below), whose sum is σ = 2757024. Its totient is φ = 459500.

The previous prime is 1378501. The next prime is 1378511. The reversal of 1378506 is 6058731.

It is an interprime number because it is at equal distance from previous prime (1378501) and next prime (1378511).

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

1378506 is an admirable number.

It is a super-4 number, since 4×1378506⁴ (a number of 26 digits) contains 4444 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1378501) 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, 114870 + ... + 114881.

It is an arithmetic number, because the mean of its divisors is an integer number (344628).

2^1378506 is an apocalyptic number.

1378506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1378506 is a wasteful number, since it uses less digits than its factorization.

1378506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229756.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1378506 is about 1174.0979516207. The cubic root of 1378506 is about 111.2934367268.

The spelling of 1378506 in words is "one million, three hundred seventy-eight thousand, five hundred six".