1253001243 has 16 divisors (see below), whose sum is σ = 1801207296. Its totient is φ = 770209440.

The previous prime is 1253001241. The next prime is 1253001271. The reversal of 1253001243 is 3421003521.

It is not a de Polignac number, because 1253001243 - 2¹ = 1253001241 is a prime.

It is a super-3 number, since 3×1253001243³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1253001241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17896 + ... + 53162.

It is an arithmetic number, because the mean of its divisors is an integer number (112575456).

Almost surely, 2^1253001243 is an apocalyptic number.

1253001243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1253001243 is a deficient number, since it is larger than the sum of its proper divisors (548206053).

1253001243 is a wasteful number, since it uses less digits than its factorization.

1253001243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36194.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1253001243 is about 35397.7575984694. The cubic root of 1253001243 is about 1078.0787868820.

Adding to 1253001243 its reverse (3421003521), we get a palindrome (4674004764).

The spelling of 1253001243 in words is "one billion, two hundred fifty-three million, one thousand, two hundred forty-three".