1273397760 has 480 divisors, whose sum is σ = 4825941120. Its totient is φ = 321159168.

The previous prime is 1273397729. The next prime is 1273397777. The reversal of 1273397760 is 677933721.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14307796 + ... + 14307884.

It is an arithmetic number, because the mean of its divisors is an integer number (10054044).

Almost surely, 2^1273397760 is an apocalyptic number.

1273397760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273397760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2412970560).

1273397760 is an abundant number, since it is smaller than the sum of its proper divisors (3552543360).

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

1273397760 is an frugal number, since it uses more digits than its factorization.

1273397760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 333396, while the sum is 45.

The square root of 1273397760 is about 35684.6992421122. The cubic root of 1273397760 is about 1083.8970322896.

The spelling of 1273397760 in words is "one billion, two hundred seventy-three million, three hundred ninety-seven thousand, seven hundred sixty".