1378523 has 4 divisors (see below), whose sum is σ = 1391280. Its totient is φ = 1365768.

The previous prime is 1378519. The next prime is 1378529. The reversal of 1378523 is 3258731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1378523 - 2² = 1378519 is a prime.

It is a super-4 number, since 4×1378523⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378529) 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, 6215 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (347820).

2^1378523 is an apocalyptic number.

1378523 is a deficient number, since it is larger than the sum of its proper divisors (12757).

1378523 is a wasteful number, since it uses less digits than its factorization.

1378523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12756.

The product of its digits is 5040, while the sum is 29.

The square root of 1378523 is about 1174.1051911988. The cubic root of 1378523 is about 111.2938942222.

The spelling of 1378523 in words is "one million, three hundred seventy-eight thousand, five hundred twenty-three".