1612145 has 4 divisors (see below), whose sum is σ = 1934580. Its totient is φ = 1289712.

The previous prime is 1612141. The next prime is 1612157. The reversal of 1612145 is 5412161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5412161 = 1061 ⋅5101.

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 1442401 = 412^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612145 - 2² = 1612141 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1612141) 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, 161210 + ... + 161219.

It is an arithmetic number, because the mean of its divisors is an integer number (483645).

2^1612145 is an apocalyptic number.

It is an amenable number.

1612145 is a deficient number, since it is larger than the sum of its proper divisors (322435).

1612145 is an equidigital number, since it uses as much as digits as its factorization.

1612145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322434.

The product of its digits is 240, while the sum is 20.

The square root of 1612145 is about 1269.7027211123. The cubic root of 1612145 is about 117.2558988550.

The spelling of 1612145 in words is "one million, six hundred twelve thousand, one hundred forty-five".