1620113 has 4 divisors (see below), whose sum is σ = 1767408. Its totient is φ = 1472820.

The previous prime is 1620107. The next prime is 1620121. The reversal of 1620113 is 3110261.

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 a cyclic number.

It is not a de Polignac number, because 1620113 - 2⁸ = 1619857 is a prime.

It is a super-2 number, since 2×1620113² = 5249532265538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620103) 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, 73631 + ... + 73652.

It is an arithmetic number, because the mean of its divisors is an integer number (441852).

2^1620113 is an apocalyptic number.

It is an amenable number.

1620113 is a deficient number, since it is larger than the sum of its proper divisors (147295).

1620113 is a wasteful number, since it uses less digits than its factorization.

1620113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147294.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1620113 is about 1272.8365959541. The cubic root of 1620113 is about 117.4487599126.

Adding to 1620113 its reverse (3110261), we get a palindrome (4730374).

The spelling of 1620113 in words is "one million, six hundred twenty thousand, one hundred thirteen".