1253533140 has 36 divisors (see below), whose sum is σ = 3802384404. Its totient is φ = 334275456.

The previous prime is 1253533121. The next prime is 1253533153. The reversal of 1253533140 is 413353521.

1253533140 is a `hidden beast` number, since 125 + 3 + 533 + 1 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 833938884 + 419594256 = 28878^2 + 20484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 3481857 + ... + 3482216.

It is an arithmetic number, because the mean of its divisors is an integer number (105621789).

Almost surely, 2^1253533140 is an apocalyptic number.

1253533140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253533140 is an abundant number, since it is smaller than the sum of its proper divisors (2548851264).

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

1253533140 is a wasteful number, since it uses less digits than its factorization.

1253533140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964088 (or 6964083 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1253533140 is about 35405.2699467184. The cubic root of 1253533140 is about 1078.2313128685.

Adding to 1253533140 its reverse (413353521), we get a palindrome (1666886661).

The spelling of 1253533140 in words is "one billion, two hundred fifty-three million, five hundred thirty-three thousand, one hundred forty".