7162281 has 36 divisors (see below), whose sum is σ = 12226500. Its totient is φ = 4027968.

The previous prime is 7162273. The next prime is 7162289. The reversal of 7162281 is 1822617.

It is an interprime number because it is at equal distance from previous prime (7162273) and next prime (7162289).

It can be written as a sum of positive squares in 2 ways, for example, as 2752281 + 4410000 = 1659^2 + 2100^2 .

It is not a de Polignac number, because 7162281 - 2³ = 7162273 is a prime.

It is a super-2 number, since 2×7162281² = 102596538245922, which contains 22 as substring.

7162281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7162289) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47995 + ... + 48143.

It is an arithmetic number, because the mean of its divisors is an integer number (339625).

Almost surely, 2^7162281 is an apocalyptic number.

It is an amenable number.

7162281 is a deficient number, since it is larger than the sum of its proper divisors (5064219).

7162281 is a wasteful number, since it uses less digits than its factorization.

7162281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 268 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 7162281 is about 2676.2438229728. The cubic root of 7162281 is about 192.7600892032.

Adding to 7162281 its reverse (1822617), we get a palindrome (8984898).

The spelling of 7162281 in words is "seven million, one hundred sixty-two thousand, two hundred eighty-one".