1273800140 has 24 divisors (see below), whose sum is σ = 2832332832. Its totient is φ = 479548160.

The previous prime is 1273800139. The next prime is 1273800161. The reversal of 1273800140 is 410083721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872896 + ... + 1873575.

It is an arithmetic number, because the mean of its divisors is an integer number (118013868).

Almost surely, 2^1273800140 is an apocalyptic number.

1273800140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273800140 is an abundant number, since it is smaller than the sum of its proper divisors (1558532692).

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

1273800140 is a wasteful number, since it uses less digits than its factorization.

1273800140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746497 (or 3746495 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1273800140 is about 35690.3367874275. The cubic root of 1273800140 is about 1084.0111868691.

Adding to 1273800140 its reverse (410083721), we get a palindrome (1683883861).

The spelling of 1273800140 in words is "one billion, two hundred seventy-three million, eight hundred thousand, one hundred forty".