245325021 has 4 divisors (see below), whose sum is σ = 327100032. Its totient is φ = 163550012.

The previous prime is 245324971. The next prime is 245325043. The reversal of 245325021 is 120523542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245325021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245324982 and 245325000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245325071) 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 3 ways as a sum of consecutive naturals, for example, 40887501 + ... + 40887506.

It is an arithmetic number, because the mean of its divisors is an integer number (81775008).

Almost surely, 2^245325021 is an apocalyptic number.

It is an amenable number.

245325021 is a deficient number, since it is larger than the sum of its proper divisors (81775011).

245325021 is an equidigital number, since it uses as much as digits as its factorization.

245325021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81775010.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 245325021 is about 15662.8548164120. The cubic root of 245325021 is about 626.0090546040.

Adding to 245325021 its reverse (120523542), we get a palindrome (365848563).

The spelling of 245325021 in words is "two hundred forty-five million, three hundred twenty-five thousand, twenty-one".