1252115221 has 8 divisors (see below), whose sum is σ = 1431207360. Its totient is φ = 1073077728.

The previous prime is 1252115191. The next prime is 1252115231. The reversal of 1252115221 is 1225112521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252115221 - 2⁹ = 1252114709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252115192 and 1252115201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252115231) 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 7 ways as a sum of consecutive naturals, for example, 68010 + ... + 84436.

It is an arithmetic number, because the mean of its divisors is an integer number (178900920).

Almost surely, 2^1252115221 is an apocalyptic number.

It is an amenable number.

1252115221 is a deficient number, since it is larger than the sum of its proper divisors (179092139).

1252115221 is a wasteful number, since it uses less digits than its factorization.

1252115221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27323.

The product of its digits is 400, while the sum is 22.

The square root of 1252115221 is about 35385.2401574442. The cubic root of 1252115221 is about 1077.8246166742.

Adding to 1252115221 its reverse (1225112521), we get a palindrome (2477227742).

The spelling of 1252115221 in words is "one billion, two hundred fifty-two million, one hundred fifteen thousand, two hundred twenty-one".