1612081 has 4 divisors (see below), whose sum is σ = 1667700. Its totient is φ = 1556464.

The previous prime is 1612073. The next prime is 1612111. The reversal of 1612081 is 1802161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1802161 = 89 ⋅20249.

It can be written as a sum of positive squares in 2 ways, for example, as 312481 + 1299600 = 559^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612081 - 2³ = 1612073 is a prime.

It is a super-2 number, since 2×1612081² = 5197610301122, which contains 22 as substring.

It is a Duffinian number.

1612081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1612181) 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, 27766 + ... + 27823.

It is an arithmetic number, because the mean of its divisors is an integer number (416925).

2^1612081 is an apocalyptic number.

It is an amenable number.

1612081 is a deficient number, since it is larger than the sum of its proper divisors (55619).

1612081 is an equidigital number, since it uses as much as digits as its factorization.

1612081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55618.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1612081 is about 1269.6775181124. The cubic root of 1612081 is about 117.2543472004.

The spelling of 1612081 in words is "one million, six hundred twelve thousand, eighty-one".