1383621 has 4 divisors (see below), whose sum is σ = 1844832. Its totient is φ = 922412.

The previous prime is 1383607. The next prime is 1383653. The reversal of 1383621 is 1263831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1383621 - 2⁵ = 1383589 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1383591 and 1383600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383691) 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, 230601 + ... + 230606.

It is an arithmetic number, because the mean of its divisors is an integer number (461208).

2^1383621 is an apocalyptic number.

It is an amenable number.

1383621 is a deficient number, since it is larger than the sum of its proper divisors (461211).

1383621 is an equidigital number, since it uses as much as digits as its factorization.

1383621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461210.

The product of its digits is 864, while the sum is 24.

The square root of 1383621 is about 1176.2742027266. The cubic root of 1383621 is about 111.4309196932.

The spelling of 1383621 in words is "one million, three hundred eighty-three thousand, six hundred twenty-one".