1621002 has 8 divisors (see below), whose sum is σ = 3242016. Its totient is φ = 540332.

The previous prime is 1620989. The next prime is 1621019. The reversal of 1621002 is 2001261.

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

1621002 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135078 + ... + 135089.

It is an arithmetic number, because the mean of its divisors is an integer number (405252).

2^1621002 is an apocalyptic number.

1621002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621002 is a wasteful number, since it uses less digits than its factorization.

1621002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270172.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1621002 is about 1273.1857680637. The cubic root of 1621002 is about 117.4702384258.

Adding to 1621002 its reverse (2001261), we get a palindrome (3622263).

The spelling of 1621002 in words is "one million, six hundred twenty-one thousand, two".