1252656243 has 12 divisors (see below), whose sum is σ = 1809727608. Its totient is φ = 834949440.

The previous prime is 1252656241. The next prime is 1252656257. The reversal of 1252656243 is 3426562521.

1252656243 is a `hidden beast` number, since 1 + 2 + 5 + 26 + 5 + 624 + 3 = 666.

It is not a de Polignac number, because 1252656243 - 2¹ = 1252656241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252656198 and 1252656207.

It is not an unprimeable number, because it can be changed into a prime (1252656241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60171 + ... + 78267.

It is an arithmetic number, because the mean of its divisors is an integer number (150810634).

Almost surely, 2^1252656243 is an apocalyptic number.

1252656243 is a deficient number, since it is larger than the sum of its proper divisors (557071365).

1252656243 is a wasteful number, since it uses less digits than its factorization.

1252656243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25794 (or 25791 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1252656243 is about 35392.8840729319. The cubic root of 1252656243 is about 1077.9798321190.

The spelling of 1252656243 in words is "one billion, two hundred fifty-two million, six hundred fifty-six thousand, two hundred forty-three".