1621411 has 4 divisors (see below), whose sum is σ = 1768824. Its totient is φ = 1474000.

The previous prime is 1621397. The next prime is 1621421. The reversal of 1621411 is 1141261.

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

It is not a de Polignac number, because 1621411 - 2⁷ = 1621283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621421) 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, 73690 + ... + 73711.

It is an arithmetic number, because the mean of its divisors is an integer number (442206).

2^1621411 is an apocalyptic number.

1621411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1621411 is a deficient number, since it is larger than the sum of its proper divisors (147413).

1621411 is a wasteful number, since it uses less digits than its factorization.

1621411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147412.

The product of its digits is 48, while the sum is 16.

The square root of 1621411 is about 1273.3463786417. The cubic root of 1621411 is about 117.4801173540.

Adding to 1621411 its reverse (1141261), we get a palindrome (2762672).

The spelling of 1621411 in words is "one million, six hundred twenty-one thousand, four hundred eleven".