245421045 has 12 divisors (see below), whose sum is σ = 425396556. Its totient is φ = 130891200.

The previous prime is 245421031. The next prime is 245421047. The reversal of 245421045 is 540124542.

It can be written as a sum of positive squares in 2 ways, for example, as 74805201 + 170615844 = 8649^2 + 13062^2 .

It is not a de Polignac number, because 245421045 - 2⁵ = 245421013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245421047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2726856 + ... + 2726945.

It is an arithmetic number, because the mean of its divisors is an integer number (35449713).

Almost surely, 2^245421045 is an apocalyptic number.

It is an amenable number.

245421045 is a deficient number, since it is larger than the sum of its proper divisors (179975511).

245421045 is a wasteful number, since it uses less digits than its factorization.

245421045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453812 (or 5453809 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 245421045 is about 15665.9198580869. The cubic root of 245421045 is about 626.0907204855.

Adding to 245421045 its reverse (540124542), we get a palindrome (785545587).

The spelling of 245421045 in words is "two hundred forty-five million, four hundred twenty-one thousand, forty-five".