1279140 has 24 divisors (see below), whose sum is σ = 3581760. Its totient is φ = 341088.

The previous prime is 1279133. The next prime is 1279141. The reversal of 1279140 is 419721.

It is a self number, because there is not a number n which added to its sum of digits gives 1279140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10600 + ... + 10719.

It is an arithmetic number, because the mean of its divisors is an integer number (149240).

2^1279140 is an apocalyptic number.

1279140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279140 is an abundant number, since it is smaller than the sum of its proper divisors (2302620).

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

1279140 is a wasteful number, since it uses less digits than its factorization.

1279140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21331 (or 21329 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1279140 is about 1130.9907161423. The cubic root of 1279140 is about 108.5523825580.

The spelling of 1279140 in words is "one million, two hundred seventy-nine thousand, one hundred forty".