7142447169 has 81 divisors (see below), whose sum is σ = 12342087849. Its totient is φ = 3975491520.

The previous prime is 7142447131. The next prime is 7142447173. The reversal of 7142447169 is 9617442417.

The square root of 7142447169 is 84513.

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

7142447169 is a `hidden beast` number, since 7 + 1 + 42 + 447 + 169 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 444661569 + 6697785600 = 21087^2 + 81840^2 .

It is not a de Polignac number, because 7142447169 - 2²¹ = 7140350017 is a prime.

It is a super-2 number, since 2×7142447169² (a number of 21 digits) contains 22 as substring.

Its product of digits (338688) is a multiple of the sum of its prime divisors (224).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7142447129) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 36255979 + ... + 36256175.

Almost surely, 2^7142447169 is an apocalyptic number.

7142447169 is the 84513-rd square number.

7142447169 is the 42257-th centered octagonal number.

It is an amenable number.

7142447169 is a deficient number, since it is larger than the sum of its proper divisors (5199640680).

7142447169 is a wasteful number, since it uses less digits than its factorization.

7142447169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 224 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The cubic root of 7142447169 is about 1925.8199391389.

The spelling of 7142447169 in words is "seven billion, one hundred forty-two million, four hundred forty-seven thousand, one hundred sixty-nine".