1621941 has 16 divisors (see below), whose sum is σ = 2271360. Its totient is φ = 1028160.

The previous prime is 1621933. The next prime is 1621979. The reversal of 1621941 is 1491261.

It is not a de Polignac number, because 1621941 - 2³ = 1621933 is a prime.

It is a Curzon number.

1621941 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8871 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (141960).

2^1621941 is an apocalyptic number.

It is an amenable number.

1621941 is a deficient number, since it is larger than the sum of its proper divisors (649419).

1621941 is a wasteful number, since it uses less digits than its factorization.

1621941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its digits is 432, while the sum is 24.

The square root of 1621941 is about 1273.5544746889. The cubic root of 1621941 is about 117.4929164283.

The spelling of 1621941 in words is "one million, six hundred twenty-one thousand, nine hundred forty-one".