1303221040 has 40 divisors (see below), whose sum is σ = 3305444688. Its totient is φ = 473898240.

The previous prime is 1303221011. The next prime is 1303221061. The reversal of 1303221040 is 401223031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739587 + ... + 741346.

Almost surely, 2^1303221040 is an apocalyptic number.

1303221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303221040 is an abundant number, since it is smaller than the sum of its proper divisors (2002223648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1303221040 is a wasteful number, since it uses less digits than its factorization.

1303221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480957 (or 1480951 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1303221040 is about 36100.1529082634. The cubic root of 1303221040 is about 1092.2935293969.

Adding to 1303221040 its reverse (401223031), we get a palindrome (1704444071).

The spelling of 1303221040 in words is "one billion, three hundred three million, two hundred twenty-one thousand, forty".