7013281 has 12 divisors (see below), whose sum is σ = 7780500. Its totient is φ = 6316640.

The previous prime is 7013269. The next prime is 7013297. The reversal of 7013281 is 1823107.

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 5803281 = 1100^2 + 2409^2 .

It is not a de Polignac number, because 7013281 - 2¹¹ = 7011233 is a prime.

It is a super-2 number, since 2×7013281² = 98372220769922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7013381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17835 + ... + 18223.

It is an arithmetic number, because the mean of its divisors is an integer number (648375).

Almost surely, 2^7013281 is an apocalyptic number.

It is an amenable number.

7013281 is a deficient number, since it is larger than the sum of its proper divisors (767219).

7013281 is a wasteful number, since it uses less digits than its factorization.

7013281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 7013281 is about 2648.2599947890. The cubic root of 7013281 is about 191.4140210806.

Adding to 7013281 its reverse (1823107), we get a palindrome (8836388).

The spelling of 7013281 in words is "seven million, thirteen thousand, two hundred eighty-one".