1280141940 has 96 divisors (see below), whose sum is σ = 4468875264. Its totient is φ = 266002560.

The previous prime is 1280141923. The next prime is 1280141953. The reversal of 1280141940 is 491410821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1280141898 and 1280141907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133924 + ... + 143163.

It is an arithmetic number, because the mean of its divisors is an integer number (46550784).

Almost surely, 2^1280141940 is an apocalyptic number.

1280141940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280141940 is an abundant number, since it is smaller than the sum of its proper divisors (3188733324).

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

1280141940 is a wasteful number, since it uses less digits than its factorization.

1280141940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277117 (or 277115 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1280141940 is about 35779.0712568116. The cubic root of 1280141940 is about 1085.8071789500.

The spelling of 1280141940 in words is "one billion, two hundred eighty million, one hundred forty-one thousand, nine hundred forty".