1303121340 has 36 divisors (see below), whose sum is σ = 3952801944. Its totient is φ = 347498976.

The previous prime is 1303121329. The next prime is 1303121359. The reversal of 1303121340 is 431213031.

1303121340 is a `hidden beast` number, since 1 + 303 + 1 + 21 + 340 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3619602 + ... + 3619961.

It is an arithmetic number, because the mean of its divisors is an integer number (109800054).

Almost surely, 2^1303121340 is an apocalyptic number.

1303121340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303121340 is an abundant number, since it is smaller than the sum of its proper divisors (2649680604).

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

1303121340 is a wasteful number, since it uses less digits than its factorization.

1303121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239578 (or 7239573 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1303121340 is about 36098.7720012745. The cubic root of 1303121340 is about 1092.2656741984.

Adding to 1303121340 its reverse (431213031), we get a palindrome (1734334371).

The spelling of 1303121340 in words is "one billion, three hundred three million, one hundred twenty-one thousand, three hundred forty".