1645425245 has 8 divisors (see below), whose sum is σ = 1975173720. Its totient is φ = 1315897920.

The previous prime is 1645425233. The next prime is 1645425247. The reversal of 1645425245 is 5425245461.

It can be written as a sum of positive squares in 4 ways, for example, as 396368281 + 1249056964 = 19909^2 + 35342^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1645425245 - 2²⁴ = 1628648029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1645425199 and 1645425208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645425247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38450 + ... + 69059.

It is an arithmetic number, because the mean of its divisors is an integer number (246896715).

Almost surely, 2^1645425245 is an apocalyptic number.

It is an amenable number.

1645425245 is a deficient number, since it is larger than the sum of its proper divisors (329748475).

1645425245 is a wasteful number, since it uses less digits than its factorization.

1645425245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110575.

The product of its digits is 192000, while the sum is 38.

The square root of 1645425245 is about 40563.8415956872. The cubic root of 1645425245 is about 1180.5726524794.

The spelling of 1645425245 in words is "one billion, six hundred forty-five million, four hundred twenty-five thousand, two hundred forty-five".