1273851040 has 144 divisors (see below), whose sum is σ = 3819330144. Its totient is φ = 397017600.

The previous prime is 1273850993. The next prime is 1273851077. The reversal of 1273851040 is 401583721.

It is a junction number, because it is equal to n+sod(n) for n = 1273850993 and 1273851011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78855 + ... + 93625.

It is an arithmetic number, because the mean of its divisors is an integer number (26523126).

Almost surely, 2^1273851040 is an apocalyptic number.

1273851040 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 1273851040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909665072).

1273851040 is an abundant number, since it is smaller than the sum of its proper divisors (2545479104).

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

1273851040 is a wasteful number, since it uses less digits than its factorization.

1273851040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14811 (or 14796 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1273851040 is about 35691.0498584729. The cubic root of 1273851040 is about 1084.0256254069.

The spelling of 1273851040 in words is "one billion, two hundred seventy-three million, eight hundred fifty-one thousand, forty".