1620701 has 4 divisors (see below), whose sum is σ = 1655232. Its totient is φ = 1586172.

The previous prime is 1620679. The next prime is 1620733. The reversal of 1620701 is 1070261.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1070261 = 683 ⋅1567.

It is a cyclic number.

It is not a de Polignac number, because 1620701 - 2¹⁰ = 1619677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17195 + ... + 17288.

It is an arithmetic number, because the mean of its divisors is an integer number (413808).

2^1620701 is an apocalyptic number.

It is an amenable number.

1620701 is a deficient number, since it is larger than the sum of its proper divisors (34531).

1620701 is an equidigital number, since it uses as much as digits as its factorization.

1620701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34530.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1620701 is about 1273.0675551596. The cubic root of 1620701 is about 117.4629670528.

Adding to 1620701 its reverse (1070261), we get a palindrome (2690962).

The spelling of 1620701 in words is "one million, six hundred twenty thousand, seven hundred one".