2870281 has 4 divisors (see below), whose sum is σ = 2874064. Its totient is φ = 2866500.

The previous prime is 2870279. The next prime is 2870323. The reversal of 2870281 is 1820782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2870281 - 2¹ = 2870279 is a prime.

It is a super-2 number, since 2×2870281² = 16477026037922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2870081) 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, 315 + ... + 2416.

It is an arithmetic number, because the mean of its divisors is an integer number (718516).

2^2870281 is an apocalyptic number.

2870281 is the 1072-nd centered pentagonal number.

It is an amenable number.

2870281 is a deficient number, since it is larger than the sum of its proper divisors (3783).

2870281 is a wasteful number, since it uses less digits than its factorization.

2870281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2870281 is about 1694.1903671075. The cubic root of 2870281 is about 142.1155080790.

The spelling of 2870281 in words is "two million, eight hundred seventy thousand, two hundred eighty-one".