1280072 has 8 divisors (see below), whose sum is σ = 2400150. Its totient is φ = 640032.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280072 is 2700821.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 630436 = 806^2 + 794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 79997 + ... + 80012.

2^1280072 is an apocalyptic number.

It is an amenable number.

1280072 is a deficient number, since it is larger than the sum of its proper divisors (1120078).

1280072 is a wasteful number, since it uses less digits than its factorization.

1280072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160015 (or 160011 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1280072 is about 1131.4026692562. The cubic root of 1280072 is about 108.5787404388.

Adding to 1280072 its reverse (2700821), we get a palindrome (3980893).

It can be divided in two parts, 12800 and 72, that multiplied together give a square (921600 = 960²).

The spelling of 1280072 in words is "one million, two hundred eighty thousand, seventy-two".