1621039 has 8 divisors (see below), whose sum is σ = 1860608. Its totient is φ = 1383480.

The previous prime is 1621033. The next prime is 1621043. The reversal of 1621039 is 9301261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1621039 - 2³ = 1621031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2254 + ... + 2884.

It is an arithmetic number, because the mean of its divisors is an integer number (232576).

2^1621039 is an apocalyptic number.

1621039 is a deficient number, since it is larger than the sum of its proper divisors (239569).

1621039 is an equidigital number, since it uses as much as digits as its factorization.

1621039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1621039 is about 1273.2002984605. The cubic root of 1621039 is about 117.4711321869.

The spelling of 1621039 in words is "one million, six hundred twenty-one thousand, thirty-nine".