1252365543 has 60 divisors (see below), whose sum is σ = 2210225688. Its totient is φ = 700539840.

The previous prime is 1252365463. The next prime is 1252365599. The reversal of 1252365543 is 3455632521.

1252365543 is a `hidden beast` number, since 1 + 2 + 52 + 3 + 65 + 543 = 666.

It is not a de Polignac number, because 1252365543 - 2²⁰ = 1251316967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252365498 and 1252365507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252365643) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 146421 + ... + 154737.

Almost surely, 2^1252365543 is an apocalyptic number.

1252365543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1252365543 is a deficient number, since it is larger than the sum of its proper divisors (957860145).

1252365543 is a wasteful number, since it uses less digits than its factorization.

1252365543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8366 (or 8344 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 1252365543 is about 35388.7770769209. Note that the first 3 decimals coincide. The cubic root of 1252365543 is about 1077.8964378697.

The spelling of 1252365543 in words is "one billion, two hundred fifty-two million, three hundred sixty-five thousand, five hundred forty-three".