1252645211 has 4 divisors (see below), whose sum is σ = 1252749192. Its totient is φ = 1252541232.

The previous prime is 1252645193. The next prime is 1252645217. The reversal of 1252645211 is 1125462521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1125462521 = 43 ⋅26173547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252645211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252645217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31130 + ... + 58943.

It is an arithmetic number, because the mean of its divisors is an integer number (313187298).

Almost surely, 2^1252645211 is an apocalyptic number.

1252645211 is a deficient number, since it is larger than the sum of its proper divisors (103981).

1252645211 is an equidigital number, since it uses as much as digits as its factorization.

1252645211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103980.

The product of its digits is 4800, while the sum is 29.

The square root of 1252645211 is about 35392.7282220515. The cubic root of 1252645211 is about 1077.9766675614.

The spelling of 1252645211 in words is "one billion, two hundred fifty-two million, six hundred forty-five thousand, two hundred eleven".