1391064 has 32 divisors (see below), whose sum is σ = 3510000. Its totient is φ = 459392.

The previous prime is 1391057. The next prime is 1391081. The reversal of 1391064 is 4601931.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3382 + ... + 3770.

2^1391064 is an apocalyptic number.

It is an amenable number.

1391064 is an abundant number, since it is smaller than the sum of its proper divisors (2118936).

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

1391064 is a wasteful number, since it uses less digits than its factorization.

1391064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1391064 is about 1179.4337624470. The cubic root of 1391064 is about 111.6303716106.

Adding to 1391064 its reverse (4601931), we get a palindrome (5992995).

The spelling of 1391064 in words is "one million, three hundred ninety-one thousand, sixty-four".