1611421 has 4 divisors (see below), whose sum is σ = 1841632. Its totient is φ = 1381212.

The previous prime is 1611419. The next prime is 1611433. The reversal of 1611421 is 1241161.

1611421 = 175² + 176² + ... + 216².

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 not a de Polignac number, because 1611421 - 2¹ = 1611419 is a prime.

It is a Duffinian number.

1611421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1611395 and 1611404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115095 + ... + 115108.

It is an arithmetic number, because the mean of its divisors is an integer number (460408).

2^1611421 is an apocalyptic number.

It is an amenable number.

1611421 is a deficient number, since it is larger than the sum of its proper divisors (230211).

1611421 is an equidigital number, since it uses as much as digits as its factorization.

1611421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230210.

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

The square root of 1611421 is about 1269.4175829884. The cubic root of 1611421 is about 117.2383433659.

Adding to 1611421 its reverse (1241161), we get a palindrome (2852582).

The spelling of 1611421 in words is "one million, six hundred eleven thousand, four hundred twenty-one".