1612649 has 2 divisors, whose sum is σ = 1612650. Its totient is φ = 1612648.

The previous prime is 1612621. The next prime is 1612669. The reversal of 1612649 is 9462161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1545049 + 67600 = 1243^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612649 - 2⁸ = 1612393 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1612609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806324 + 806325.

It is an arithmetic number, because the mean of its divisors is an integer number (806325).

2^1612649 is an apocalyptic number.

It is an amenable number.

1612649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612649 is an equidigital number, since it uses as much as digits as its factorization.

1612649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 1612649 is about 1269.9011772575. The cubic root of 1612649 is about 117.2681167006.

The spelling of 1612649 in words is "one million, six hundred twelve thousand, six hundred forty-nine".