1391464 has 8 divisors (see below), whose sum is σ = 2609010. Its totient is φ = 695728.

The previous prime is 1391461. The next prime is 1391479. The reversal of 1391464 is 4641931.

It can be written as a sum of positive squares in only one way, i.e., 887364 + 504100 = 942^2 + 710^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1391461) by changing a digit.

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 as a sum of consecutive naturals, namely, 86959 + ... + 86974.

2^1391464 is an apocalyptic number.

It is an amenable number.

1391464 is a deficient number, since it is larger than the sum of its proper divisors (1217546).

1391464 is a wasteful number, since it uses less digits than its factorization.

1391464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173939 (or 173935 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1391464 is about 1179.6033231557. The cubic root of 1391464 is about 111.6410703442.

The spelling of 1391464 in words is "one million, three hundred ninety-one thousand, four hundred sixty-four".