1645280141 has 2 divisors, whose sum is σ = 1645280142. Its totient is φ = 1645280140.

The previous prime is 1645280123. The next prime is 1645280173. The reversal of 1645280141 is 1410825461.

It is an a-pointer prime, because the next prime (1645280173) can be obtained adding 1645280141 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570457641 + 74822500 = 39629^2 + 8650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645280141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1645280098 and 1645280107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645280191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822640070 + 822640071.

It is an arithmetic number, because the mean of its divisors is an integer number (822640071).

Almost surely, 2^1645280141 is an apocalyptic number.

It is an amenable number.

1645280141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645280141 is an equidigital number, since it uses as much as digits as its factorization.

1645280141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1645280141 is about 40562.0529682609. The cubic root of 1645280141 is about 1180.5379480060.

The spelling of 1645280141 in words is "one billion, six hundred forty-five million, two hundred eighty thousand, one hundred forty-one".