1252051111 has 8 divisors (see below), whose sum is σ = 1259319600. Its totient is φ = 1244804352.

The previous prime is 1252051093. The next prime is 1252051123. The reversal of 1252051111 is 1111502521.

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 1252051111 - 2¹³ = 1252042919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252052111) 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, 118116 + ... + 128278.

It is an arithmetic number, because the mean of its divisors is an integer number (157414950).

Almost surely, 2^1252051111 is an apocalyptic number.

1252051111 is a deficient number, since it is larger than the sum of its proper divisors (7268489).

1252051111 is a wasteful number, since it uses less digits than its factorization.

1252051111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10865.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 1252051111 is about 35384.3342596692. The cubic root of 1252051111 is about 1077.8062209988.

Adding to 1252051111 its reverse (1111502521), we get a palindrome (2363553632).

The spelling of 1252051111 in words is "one billion, two hundred fifty-two million, fifty-one thousand, one hundred eleven".