247642132 has 12 divisors (see below), whose sum is σ = 443944116. Its totient is φ = 120800960.

The previous prime is 247642121. The next prime is 247642133. The reversal of 247642132 is 231246742.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6895876 + 240746256 = 2626^2 + 15516^2 .

It is a super-2 number, since 2×247642132² = 122653251083010848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247642094 and 247642103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247642133) 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, 754843 + ... + 755170.

It is an arithmetic number, because the mean of its divisors is an integer number (36995343).

Almost surely, 2^247642132 is an apocalyptic number.

It is an amenable number.

247642132 is a deficient number, since it is larger than the sum of its proper divisors (196301984).

247642132 is a wasteful number, since it uses less digits than its factorization.

247642132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510058 (or 1510056 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 247642132 is about 15736.6493256983. The cubic root of 247642132 is about 627.9737808032.

Adding to 247642132 its reverse (231246742), we get a palindrome (478888874).

It can be divided in two parts, 24764 and 2132, that added together give a square (26896 = 164²).

The spelling of 247642132 in words is "two hundred forty-seven million, six hundred forty-two thousand, one hundred thirty-two".