4247072 has 12 divisors (see below), whose sum is σ = 8361486. Its totient is φ = 2123520.

The previous prime is 4247071. The next prime is 4247081. The reversal of 4247072 is 2707424.

It can be written as a sum of positive squares in only one way, i.e., 2298256 + 1948816 = 1516^2 + 1396^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4247071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66329 + ... + 66392.

Almost surely, 2^4247072 is an apocalyptic number.

It is an amenable number.

4247072 is a deficient number, since it is larger than the sum of its proper divisors (4114414).

4247072 is a wasteful number, since it uses less digits than its factorization.

4247072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132731 (or 132723 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 4247072 is about 2060.8425461447. The cubic root of 4247072 is about 161.9433831520.

The spelling of 4247072 in words is "four million, two hundred forty-seven thousand, seventy-two".