1626161 has 4 divisors (see below), whose sum is σ = 1638000. Its totient is φ = 1614324.

The previous prime is 1626143. The next prime is 1626173. The reversal of 1626161 is 1616261.

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 1626161 - 2¹⁸ = 1364017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1626181) 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, 5711 + ... + 5988.

It is an arithmetic number, because the mean of its divisors is an integer number (409500).

2^1626161 is an apocalyptic number.

It is an amenable number.

1626161 is a deficient number, since it is larger than the sum of its proper divisors (11839).

1626161 is a wasteful number, since it uses less digits than its factorization.

1626161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838.

The product of its digits is 432, while the sum is 23.

The square root of 1626161 is about 1275.2101787549. The cubic root of 1626161 is about 117.5947266906.

The spelling of 1626161 in words is "one million, six hundred twenty-six thousand, one hundred sixty-one".