1273952720 has 40 divisors (see below), whose sum is σ = 2963712840. Its totient is φ = 509276160.

The previous prime is 1273952689. The next prime is 1273952737. The reversal of 1273952720 is 272593721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 452327824 + 821624896 = 21268^2 + 28664^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169196 + ... + 176564.

It is an arithmetic number, because the mean of its divisors is an integer number (74092821).

Almost surely, 2^1273952720 is an apocalyptic number.

1273952720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273952720 is an abundant number, since it is smaller than the sum of its proper divisors (1689760120).

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

1273952720 is a wasteful number, since it uses less digits than its factorization.

1273952720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543 (or 9537 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1273952720 is about 35692.4742767996. The cubic root of 1273952720 is about 1084.0544672913.

The spelling of 1273952720 in words is "one billion, two hundred seventy-three million, nine hundred fifty-two thousand, seven hundred twenty".