1478621 has 4 divisors (see below), whose sum is σ = 1481244. Its totient is φ = 1476000.

The previous prime is 1478611. The next prime is 1478627. The reversal of 1478621 is 1268741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 290521 + 1188100 = 539^2 + 1090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (370311).

2^1478621 is an apocalyptic number.

It is an amenable number.

1478621 is a deficient number, since it is larger than the sum of its proper divisors (2623).

1478621 is an equidigital number, since it uses as much as digits as its factorization.

1478621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622.

The product of its digits is 2688, while the sum is 29.

The square root of 1478621 is about 1215.9856084675. The cubic root of 1478621 is about 113.9249788547.

The spelling of 1478621 in words is "one million, four hundred seventy-eight thousand, six hundred twenty-one".