265938143 has 2 divisors, whose sum is σ = 265938144. Its totient is φ = 265938142.

The previous prime is 265938137. The next prime is 265938161. The reversal of 265938143 is 341839562.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265938143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265938143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265938103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132969071 + 132969072.

It is an arithmetic number, because the mean of its divisors is an integer number (132969072).

Almost surely, 2^265938143 is an apocalyptic number.

265938143 is a deficient number, since it is larger than the sum of its proper divisors (1).

265938143 is an equidigital number, since it uses as much as digits as its factorization.

265938143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 265938143 is about 16307.6099720345. The cubic root of 265938143 is about 643.0729035884.

The spelling of 265938143 in words is "two hundred sixty-five million, nine hundred thirty-eight thousand, one hundred forty-three".