1299140 has 24 divisors (see below), whose sum is σ = 2889432. Its totient is φ = 488960.

The previous prime is 1299101. The next prime is 1299143. The reversal of 1299140 is 419921.

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 760384 = 734^2 + 872^2 .

It is not an unprimeable number, because it can be changed into a prime (1299143) 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, 1571 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (120393).

2^1299140 is an apocalyptic number.

1299140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299140 is an abundant number, since it is smaller than the sum of its proper divisors (1590292).

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

1299140 is a wasteful number, since it uses less digits than its factorization.

1299140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847 (or 3845 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1299140 is about 1139.7982277579. The cubic root of 1299140 is about 109.1152163849.

It can be divided in two parts, 12991 and 40, that added together give a palindrome (13031).

The spelling of 1299140 in words is "one million, two hundred ninety-nine thousand, one hundred forty".