1347921 has 21 divisors (see below), whose sum is σ = 2069049. Its totient is φ = 877716.

The previous prime is 1347919. The next prime is 1347937. The reversal of 1347921 is 1297431.

The square root of 1347921 is 1161.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1347921 - 2¹ = 1347919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 1 + 3 + 4 + 7⁷ + 9² + 2¹⁹ + 1 .

It is not an unprimeable number, because it can be changed into a prime (1347901) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 31326 + ... + 31368.

2^1347921 is an apocalyptic number.

1347921 is the 1161-st square number.

1347921 is the 581-st centered octagonal number.

It is an amenable number.

1347921 is a deficient number, since it is larger than the sum of its proper divisors (721128).

1347921 is an frugal number, since it uses more digits than its factorization.

1347921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 46 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The cubic root of 1347921 is about 110.4641817257.

The spelling of 1347921 in words is "one million, three hundred forty-seven thousand, nine hundred twenty-one".