1252165943 has 6 divisors (see below), whose sum is σ = 1456601256. Its totient is φ = 1073285052.

The previous prime is 1252165933. The next prime is 1252166033. The reversal of 1252165943 is 3495612521.

It is not a de Polignac number, because 1252165943 - 2¹² = 1252161847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252165897 and 1252165906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252165933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12777155 + ... + 12777252.

It is an arithmetic number, because the mean of its divisors is an integer number (242766876).

Almost surely, 2^1252165943 is an apocalyptic number.

1252165943 is a deficient number, since it is larger than the sum of its proper divisors (204435313).

1252165943 is an equidigital number, since it uses as much as digits as its factorization.

1252165943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25554421 (or 25554414 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 1252165943 is about 35385.9568614443. The cubic root of 1252165943 is about 1077.8391703620.

The spelling of 1252165943 in words is "one billion, two hundred fifty-two million, one hundred sixty-five thousand, nine hundred forty-three".