1613421 has 6 divisors (see below), whose sum is σ = 2330510. Its totient is φ = 1075608.

The previous prime is 1613413. The next prime is 1613441. The reversal of 1613421 is 1243161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 585225 = 1014^2 + 765^2 .

It is not a de Polignac number, because 1613421 - 2³ = 1613413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1613394 and 1613403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89626 + ... + 89643.

2^1613421 is an apocalyptic number.

It is an amenable number.

1613421 is a deficient number, since it is larger than the sum of its proper divisors (717089).

1613421 is a wasteful number, since it uses less digits than its factorization.

1613421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179275 (or 179272 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1613421 is about 1270.2051015486. The cubic root of 1613421 is about 117.2868264020.

Adding to 1613421 its reverse (1243161), we get a palindrome (2856582).

The spelling of 1613421 in words is "one million, six hundred thirteen thousand, four hundred twenty-one".