1020125543 has 2 divisors, whose sum is σ = 1020125544. Its totient is φ = 1020125542.

The previous prime is 1020125471. The next prime is 1020125549. The reversal of 1020125543 is 3455210201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020125543 - 2¹⁴ = 1020109159 is a prime.

It is a super-2 number, since 2×1020125543² = 2081312246962089698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020125549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510062771 + 510062772.

It is an arithmetic number, because the mean of its divisors is an integer number (510062772).

Almost surely, 2^1020125543 is an apocalyptic number.

1020125543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020125543 is an equidigital number, since it uses as much as digits as its factorization.

1020125543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1020125543 is about 31939.4042367731. The cubic root of 1020125543 is about 1006.6640067008.

Adding to 1020125543 its reverse (3455210201), we get a palindrome (4475335744).

The spelling of 1020125543 in words is "one billion, twenty million, one hundred twenty-five thousand, five hundred forty-three".