1622601 has 6 divisors (see below), whose sum is σ = 2343770. Its totient is φ = 1081728.

The previous prime is 1622597. The next prime is 1622609. The reversal of 1622601 is 1062261.

It is a happy number.

1622601 is a `hidden beast` number, since 1 + 62 + 2 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1565001 + 57600 = 1251^2 + 240^2 .

It is not a de Polignac number, because 1622601 - 2² = 1622597 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622609) 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, 90136 + ... + 90153.

2^1622601 is an apocalyptic number.

It is an amenable number.

1622601 is a deficient number, since it is larger than the sum of its proper divisors (721169).

1622601 is a wasteful number, since it uses less digits than its factorization.

1622601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180295 (or 180292 counting only the distinct ones).

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

The square root of 1622601 is about 1273.8135656367. The cubic root of 1622601 is about 117.5088510007.

Adding to 1622601 its reverse (1062261), we get a palindrome (2684862).

It can be divided in two parts, 162260 and 1, that added together give a palindrome (162261).

The spelling of 1622601 in words is "one million, six hundred twenty-two thousand, six hundred one".