245052421 has 4 divisors (see below), whose sum is σ = 245709772. Its totient is φ = 244395072.

The previous prime is 245052389. The next prime is 245052463. The reversal of 245052421 is 124250542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183602500 + 61449921 = 13550^2 + 7839^2 .

It is a cyclic number.

It is not a de Polignac number, because 245052421 - 2⁵ = 245052389 is a prime.

It is a super-2 number, since 2×245052421² = 120101378075922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245052491) 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 3 ways as a sum of consecutive naturals, for example, 328116 + ... + 328861.

It is an arithmetic number, because the mean of its divisors is an integer number (61427443).

Almost surely, 2^245052421 is an apocalyptic number.

It is an amenable number.

245052421 is a deficient number, since it is larger than the sum of its proper divisors (657351).

245052421 is an equidigital number, since it uses as much as digits as its factorization.

245052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657350.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 245052421 is about 15654.1502803570. The cubic root of 245052421 is about 625.7770993062. Note that the first 3 decimals are identical.

The spelling of 245052421 in words is "two hundred forty-five million, fifty-two thousand, four hundred twenty-one".