245504421 has 6 divisors (see below), whose sum is σ = 354617510. Its totient is φ = 163669608.

The previous prime is 245504393. The next prime is 245504431. The reversal of 245504421 is 124405542.

It can be written as a sum of positive squares in only one way, i.e., 239816196 + 5688225 = 15486^2 + 2385^2 .

It is not a de Polignac number, because 245504421 - 2¹⁰ = 245503397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245504431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13639126 + ... + 13639143.

Almost surely, 2^245504421 is an apocalyptic number.

It is an amenable number.

245504421 is a deficient number, since it is larger than the sum of its proper divisors (109113089).

245504421 is a wasteful number, since it uses less digits than its factorization.

245504421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27278275 (or 27278272 counting only the distinct ones).

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

The square root of 245504421 is about 15668.5806951364. The cubic root of 245504421 is about 626.1616123001.

Adding to 245504421 its reverse (124405542), we get a palindrome (369909963).

The spelling of 245504421 in words is "two hundred forty-five million, five hundred four thousand, four hundred twenty-one".