245054521 has 4 divisors (see below), whose sum is σ = 245108772. Its totient is φ = 245000272.

The previous prime is 245054519. The next prime is 245054527. The reversal of 245054521 is 125450542.

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 170041600 + 75012921 = 13040^2 + 8661^2 .

It is a cyclic number.

It is not a de Polignac number, because 245054521 - 2¹ = 245054519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245054521.

It is not an unprimeable number, because it can be changed into a prime (245054527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19666 + ... + 29611.

It is an arithmetic number, because the mean of its divisors is an integer number (61277193).

Almost surely, 2^245054521 is an apocalyptic number.

It is an amenable number.

245054521 is a deficient number, since it is larger than the sum of its proper divisors (54251).

245054521 is an equidigital number, since it uses as much as digits as its factorization.

245054521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54250.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 245054521 is about 15654.2173550772. The cubic root of 245054521 is about 625.7788868532.

The spelling of 245054521 in words is "two hundred forty-five million, fifty-four thousand, five hundred twenty-one".