1378564 has 48 divisors (see below), whose sum is σ = 2963520. Its totient is φ = 552960.

The previous prime is 1378561. The next prime is 1378567. The reversal of 1378564 is 4658731.

It is an interprime number because it is at equal distance from previous prime (1378561) and next prime (1378567).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1378561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14164 + ... + 14260.

It is an arithmetic number, because the mean of its divisors is an integer number (61740).

2^1378564 is an apocalyptic number.

It is an amenable number.

1378564 is an abundant number, since it is smaller than the sum of its proper divisors (1584956).

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

1378564 is a wasteful number, since it uses less digits than its factorization.

1378564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 146 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 1378564 is about 1174.1226511741. The cubic root of 1378564 is about 111.2949975781.

The spelling of 1378564 in words is "one million, three hundred seventy-eight thousand, five hundred sixty-four".