7072144 has 10 divisors (see below), whose sum is σ = 13702310. Its totient is φ = 3536064.

The previous prime is 7072133. The next prime is 7072151. The reversal of 7072144 is 4412707.

It can be written as a sum of positive squares in only one way, i.e., 5817744 + 1254400 = 2412^2 + 1120^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220989 + ... + 221020.

It is an arithmetic number, because the mean of its divisors is an integer number (1370231).

Almost surely, 2^7072144 is an apocalyptic number.

It is an amenable number.

7072144 is a deficient number, since it is larger than the sum of its proper divisors (6630166).

7072144 is a wasteful number, since it uses less digits than its factorization.

7072144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442017 (or 442011 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 7072144 is about 2659.3502965950. The cubic root of 7072144 is about 191.9480472861.

The spelling of 7072144 in words is "seven million, seventy-two thousand, one hundred forty-four".