245321645 has 16 divisors (see below), whose sum is σ = 312076800. Its totient is φ = 184491264.

The previous prime is 245321641. The next prime is 245321669. The reversal of 245321645 is 546123542.

It is a cyclic number.

It is not a de Polignac number, because 245321645 - 2² = 245321641 is a prime.

It is a super-3 number, since 3×245321645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245321641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117884 + ... + 119946.

It is an arithmetic number, because the mean of its divisors is an integer number (19504800).

Almost surely, 2^245321645 is an apocalyptic number.

It is an amenable number.

245321645 is a deficient number, since it is larger than the sum of its proper divisors (66755155).

245321645 is a wasteful number, since it uses less digits than its factorization.

245321645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

The product of its digits is 28800, while the sum is 32.

The square root of 245321645 is about 15662.7470451387. The cubic root of 245321645 is about 626.0061830173.

The spelling of 245321645 in words is "two hundred forty-five million, three hundred twenty-one thousand, six hundred forty-five".