1252105217 has 12 divisors (see below), whose sum is σ = 1381797648. Its totient is φ = 1133715000.

The previous prime is 1252105193. The next prime is 1252105219. The reversal of 1252105217 is 7125012521.

It is not a de Polignac number, because 1252105217 - 2¹⁰ = 1252104193 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1252105219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9758 + ... + 50984.

It is an arithmetic number, because the mean of its divisors is an integer number (115149804).

Almost surely, 2^1252105217 is an apocalyptic number.

It is an amenable number.

1252105217 is a deficient number, since it is larger than the sum of its proper divisors (129692431).

1252105217 is a wasteful number, since it uses less digits than its factorization.

1252105217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41500 (or 41489 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 1252105217 is about 35385.0987987882. The cubic root of 1252105217 is about 1077.8217461753.

Adding to 1252105217 its reverse (7125012521), we get a palindrome (8377117738).

The spelling of 1252105217 in words is "one billion, two hundred fifty-two million, one hundred five thousand, two hundred seventeen".