1331564 has 24 divisors (see below), whose sum is σ = 2598960. Its totient is φ = 592704.

The previous prime is 1331549. The next prime is 1331567. The reversal of 1331564 is 4651331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1331567) 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, 1067 + ... + 1949.

It is an arithmetic number, because the mean of its divisors is an integer number (108290).

2^1331564 is an apocalyptic number.

It is an amenable number.

1331564 is a deficient number, since it is larger than the sum of its proper divisors (1267396).

1331564 is a wasteful number, since it uses less digits than its factorization.

1331564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 927 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 1331564 is about 1153.9341402350. The cubic root of 1331564 is about 110.0155349960.

Adding to 1331564 its reverse (4651331), we get a palindrome (5982895).

The spelling of 1331564 in words is "one million, three hundred thirty-one thousand, five hundred sixty-four".