245204281 has 9 divisors (see below), whose sum is σ = 285365199. Its totient is φ = 210081144.

The previous prime is 245204273. The next prime is 245204339. The reversal of 245204281 is 182402542.

The square root of 245204281 is 15659.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 195021225 + 50183056 = 13965^2 + 7084^2 .

It is not a de Polignac number, because 245204281 - 2³ = 245204273 is a prime.

It is a super-2 number, since 2×245204281² = 120250278841453922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245204221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 108495 + ... + 110731.

Almost surely, 2^245204281 is an apocalyptic number.

245204281 is the 15659-th square number.

245204281 is the 7830-th centered octagonal number.

It is an amenable number.

245204281 is a deficient number, since it is larger than the sum of its proper divisors (40160918).

245204281 is an frugal number, since it uses more digits than its factorization.

245204281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The cubic root of 245204281 is about 625.9063381665.

The spelling of 245204281 in words is "two hundred forty-five million, two hundred four thousand, two hundred eighty-one".